diff --git a/Cargo.lock b/Cargo.lock
index 698637e..325cbcd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -569,7 +569,9 @@ dependencies = [
  "factorio-layout",
  "factorio-pathfinding",
  "rand",
+ "serde",
  "serde_json",
+ "serde_yaml",
 ]
 
 [[package]]
diff --git a/factorio-blueprint-generator/Cargo.toml b/factorio-blueprint-generator/Cargo.toml
index ecd7d55..6bac0b7 100644
--- a/factorio-blueprint-generator/Cargo.toml
+++ b/factorio-blueprint-generator/Cargo.toml
@@ -8,6 +8,8 @@ factorio-pathfinding = { path = "../factorio-pathfinding" }
 factorio-layout = { path = "../factorio-layout" }
 factorio-core = { path = "../factorio-core" }
 factorio-blueprint = { path = "../factorio-blueprint" }
+serde = { version = "1.0.192", features = ["derive"] }
 serde_json = "1.0.135"
+serde_yaml = "0.9.34"
 clap = { version = "4.5.26", features = ["derive"] }
 rand = { version = "0.8.5", features = ["small_rng"] }
diff --git a/factorio-blueprint-generator/factory_graph_fast_inserter.yml b/factorio-blueprint-generator/factory_graph_fast_inserter.yml
new file mode 100644
index 0000000..748f0ef
--- /dev/null
+++ b/factorio-blueprint-generator/factory_graph_fast_inserter.yml
@@ -0,0 +1,43 @@
+subfactories:
+  - !SubFactory
+    recipe: iron-gear-wheel
+    machines: 2
+    machine: assembly-machine-3
+  - !SubFactory
+    recipe: copper-cable
+    machines: 9
+    machine: assembly-machine-3
+  - !SubFactory
+    recipe: electronic-circuit
+    machines: 6
+    machine: assembly-machine-3
+  - !BeltPool
+  - !SubFactory
+    recipe: inserter
+    machines: 2
+    machine: assembly-machine-3
+  - !SubFactory
+    recipe: fast-inserter
+    machines: 2
+    machine: assembly-machine-3
+factory_connections:
+  - item: iron-gear-wheel
+    amount: 5
+    from: 0
+    to: 4
+  - item: copper-cable
+    amount: 45
+    from: 1
+    to: 2
+  - item: electronic-circuit
+    amount: 15
+    from: 2
+    to: 3
+  - item: electronic-circuit
+    amount: 5
+    from: 3
+    to: 4
+  - item: electronic-circuit
+    amount: 10
+    from: 3
+    to: 5
diff --git a/factorio-blueprint-generator/factory_graph_inserter.yml b/factorio-blueprint-generator/factory_graph_inserter.yml
new file mode 100644
index 0000000..7e5e2cb
--- /dev/null
+++ b/factorio-blueprint-generator/factory_graph_inserter.yml
@@ -0,0 +1,49 @@
+subfactories:
+  - !SubFactory
+    recipe: iron-gear-wheel
+    machines: 2
+    machine: assembly-machine-3
+  - !SubFactory
+    recipe: copper-cable
+    machines: 3
+    machine: assembly-machine-3
+  - !SubFactory
+    recipe: electronic-circuit
+    machines: 2
+    machine: assembly-machine-3
+  - !SubFactory
+    recipe: inserter
+    machines: 2
+    machine: assembly-machine-3
+  - !ExternalConnection
+    inputs: 1
+    outputs: 5
+factory_connections:
+  - item: iron-gear-wheel
+    amount: 5
+    from: 0
+    to: 3
+  - item: copper-cable
+    amount: 15
+    from: 1
+    to: 2
+  - item: electronic-circuit
+    amount: 5
+    from: 2
+    to: 3
+  - item: iron-plate
+    amount: 10
+    from: 4
+    to: 0
+  - item: iron-plate
+    amount: 5
+    from: 4
+    to: 2
+  - item: copper-plate
+    amount: 7.5
+    from: 4
+    to: 1
+  - item: inserter
+    amount: 5
+    from: 3
+    to: 4
diff --git a/factorio-blueprint-generator/src/assembly.rs b/factorio-blueprint-generator/src/assembly.rs
index 8210161..ae7968e 100644
--- a/factorio-blueprint-generator/src/assembly.rs
+++ b/factorio-blueprint-generator/src/assembly.rs
@@ -214,3 +214,385 @@ pub fn assembly_line(assembly_machines: usize, recipe: impl AsRef<str>) -> Bluep
 
     blueprint
 }
+
+pub fn assembly_line_2_input(
+    assembly_machines: usize,
+    recipe: impl AsRef<str>,
+    input_belt1: Beltspeed,
+    input_belt2: Option<Beltspeed>,
+    output_belt: Beltspeed,
+) -> (Blueprint, Position, PositionType, Vec<PositionType>) {
+    let halve_machines = assembly_machines / 2;
+    let mut blueprint = Blueprint::new();
+
+    let mut last = None;
+    for i in (0..halve_machines.div_ceil(3)).rev() {
+        let y_pos = if i == halve_machines.div_ceil(3) - 1 && halve_machines % 3 == 1 {
+            1 + 18 * i as PositionType
+        } else {
+            9 + 18 * i as PositionType
+        };
+        let top = blueprint.add_entity(Entity::new_electric_pole(
+            ElectricPoleType::Medium,
+            Position::new(y_pos, 5),
+        ));
+
+        let middle = blueprint.add_entity(Entity::new_electric_pole(
+            ElectricPoleType::Medium,
+            Position::new(y_pos, 17),
+        ));
+
+        let bottom = blueprint.add_entity(Entity::new_electric_pole(
+            ElectricPoleType::Medium,
+            Position::new(y_pos, 25),
+        ));
+
+        blueprint.add_wire(top, 5, middle, 5);
+        blueprint.add_wire(middle, 5, bottom, 5);
+        if let Some((last_top, last_middle, last_bottom)) = last {
+            blueprint.add_wire(top, 5, last_top, 5);
+            blueprint.add_wire(middle, 5, last_middle, 5);
+            blueprint.add_wire(bottom, 5, last_bottom, 5);
+        }
+
+        last = Some((top, middle, bottom));
+    }
+
+    for i in 0..halve_machines {
+        blueprint.add_entity(Entity::new_production(
+            "assembling-machine-3",
+            recipe.as_ref(),
+            Position::new(3 + 6 * i as PositionType, 9),
+            Direction::Up,
+            Position::new(6, 6),
+        ));
+        blueprint.add_entity(Entity::new_production(
+            "assembling-machine-3",
+            recipe.as_ref(),
+            Position::new(3 + 6 * i as PositionType, 21),
+            Direction::Up,
+            Position::new(6, 6),
+        ));
+        match i % 3 {
+            0 => {
+                if input_belt2.is_some() {
+                    blueprint.add_entity(Entity::new_inserter(
+                        InserterType::Long,
+                        None,
+                        Position::new(3 + 6 * i as PositionType, 5),
+                        Direction::Up,
+                    ));
+                    blueprint.add_entity(Entity::new_inserter(
+                        InserterType::Long,
+                        None,
+                        Position::new(3 + 6 * i as PositionType, 25),
+                        Direction::Down,
+                    ));
+                }
+                blueprint.add_entity(Entity::new_inserter(
+                    InserterType::Fast,
+                    None,
+                    Position::new(5 + 6 * i as PositionType, 5),
+                    Direction::Up,
+                ));
+                blueprint.add_entity(Entity::new_inserter(
+                    InserterType::Fast,
+                    None,
+                    Position::new(3 + 6 * i as PositionType, 13),
+                    Direction::Up,
+                ));
+                blueprint.add_entity(Entity::new_inserter(
+                    InserterType::Fast,
+                    None,
+                    Position::new(3 + 6 * i as PositionType, 17),
+                    Direction::Down,
+                ));
+                blueprint.add_entity(Entity::new_inserter(
+                    InserterType::Fast,
+                    None,
+                    Position::new(5 + 6 * i as PositionType, 25),
+                    Direction::Down,
+                ));
+            }
+            1 => {
+                if input_belt2.is_some() {
+                    blueprint.add_entity(Entity::new_inserter(
+                        InserterType::Long,
+                        None,
+                        Position::new(1 + 6 * i as PositionType, 5),
+                        Direction::Up,
+                    ));
+                    blueprint.add_entity(Entity::new_inserter(
+                        InserterType::Long,
+                        None,
+                        Position::new(1 + 6 * i as PositionType, 25),
+                        Direction::Down,
+                    ));
+                }
+                blueprint.add_entity(Entity::new_inserter(
+                    InserterType::Fast,
+                    None,
+                    Position::new(5 + 6 * i as PositionType, 5),
+                    Direction::Up,
+                ));
+                blueprint.add_entity(Entity::new_inserter(
+                    InserterType::Fast,
+                    None,
+                    Position::new(1 + 6 * i as PositionType, 13),
+                    Direction::Up,
+                ));
+                blueprint.add_entity(Entity::new_inserter(
+                    InserterType::Fast,
+                    None,
+                    Position::new(1 + 6 * i as PositionType, 17),
+                    Direction::Down,
+                ));
+                blueprint.add_entity(Entity::new_inserter(
+                    InserterType::Fast,
+                    None,
+                    Position::new(5 + 6 * i as PositionType, 25),
+                    Direction::Down,
+                ));
+            }
+            2 => {
+                if input_belt2.is_some() {
+                    blueprint.add_entity(Entity::new_inserter(
+                        InserterType::Long,
+                        None,
+                        Position::new(1 + 6 * i as PositionType, 5),
+                        Direction::Up,
+                    ));
+                    blueprint.add_entity(Entity::new_inserter(
+                        InserterType::Long,
+                        None,
+                        Position::new(1 + 6 * i as PositionType, 25),
+                        Direction::Down,
+                    ));
+                }
+                blueprint.add_entity(Entity::new_inserter(
+                    InserterType::Fast,
+                    None,
+                    Position::new(3 + 6 * i as PositionType, 5),
+                    Direction::Up,
+                ));
+                blueprint.add_entity(Entity::new_inserter(
+                    InserterType::Fast,
+                    None,
+                    Position::new(1 + 6 * i as PositionType, 13),
+                    Direction::Up,
+                ));
+                blueprint.add_entity(Entity::new_inserter(
+                    InserterType::Fast,
+                    None,
+                    Position::new(1 + 6 * i as PositionType, 17),
+                    Direction::Down,
+                ));
+                blueprint.add_entity(Entity::new_inserter(
+                    InserterType::Fast,
+                    None,
+                    Position::new(3 + 6 * i as PositionType, 25),
+                    Direction::Down,
+                ));
+            }
+            _ => unreachable!(),
+        }
+    }
+
+    for i in 0..(3 * halve_machines + 2) {
+        if let Some(beltspeed) = input_belt2 {
+            if i > 0 {
+                blueprint.add_entity(Entity::new_belt(
+                    beltspeed,
+                    Position::new(1 + 2 * i as PositionType, 1),
+                    Direction::Left,
+                ));
+            }
+        }
+        if i < (3 * halve_machines) {
+            blueprint.add_entity(Entity::new_belt(
+                input_belt1,
+                Position::new(1 + 2 * i as PositionType, 3),
+                Direction::Right,
+            ));
+        }
+        if i < (3 * halve_machines - 1) {
+            blueprint.add_entity(Entity::new_belt(
+                output_belt,
+                Position::new(1 + 2 * i as PositionType, 15),
+                Direction::Left,
+            ));
+        }
+        if i > 1 && i < (3 * halve_machines + 1) {
+            blueprint.add_entity(Entity::new_belt(
+                input_belt1,
+                Position::new(1 + 2 * i as PositionType, 27),
+                Direction::Left,
+            ));
+        }
+        if let Some(beltspeed) = input_belt2 {
+            if i < (3 * halve_machines + 1) {
+                blueprint.add_entity(Entity::new_belt(
+                    beltspeed,
+                    Position::new(1 + 2 * i as PositionType, 29),
+                    Direction::Right,
+                ));
+            }
+        }
+    }
+
+    for i in 0..15 {
+        if i > 0 && i < 13 {
+            blueprint.add_entity(Entity::new_belt(
+                input_belt1,
+                Position::new(
+                    1 + 6 * halve_machines as PositionType,
+                    1 + 2 * i as PositionType,
+                ),
+                Direction::Down,
+            ));
+        }
+        if let Some(beltspeed) = input_belt2 {
+            if i > 0 {
+                blueprint.add_entity(Entity::new_belt(
+                    beltspeed,
+                    Position::new(
+                        3 + 6 * halve_machines as PositionType,
+                        1 + 2 * i as PositionType,
+                    ),
+                    Direction::Up,
+                ));
+            }
+        }
+    }
+
+    if assembly_machines % 2 == 1 {
+        let middle = blueprint.add_entity(Entity::new_electric_pole(
+            ElectricPoleType::Medium,
+            Position::new(-3, 17),
+        ));
+
+        let bottom = blueprint.add_entity(Entity::new_electric_pole(
+            ElectricPoleType::Medium,
+            Position::new(-3, 25),
+        ));
+
+        blueprint.add_wire(middle, 5, bottom, 5);
+
+        if let Some((_, last_middle, last_bottom)) = last {
+            blueprint.add_wire(middle, 5, last_middle, 5);
+            blueprint.add_wire(bottom, 5, last_bottom, 5);
+        }
+
+        blueprint.add_entity(Entity::new_production(
+            "assembling-machine-3",
+            recipe.as_ref(),
+            Position::new(-3, 21),
+            Direction::Up,
+            Position::new(6, 6),
+        ));
+
+        blueprint.add_entity(Entity::new_inserter(
+            InserterType::Fast,
+            None,
+            Position::new(-5, 17),
+            Direction::Down,
+        ));
+        blueprint.add_entity(Entity::new_inserter(
+            InserterType::Long,
+            None,
+            Position::new(-1, 17),
+            Direction::Down,
+        ));
+        blueprint.add_entity(Entity::new_inserter(
+            InserterType::Fast,
+            None,
+            Position::new(-1, 25),
+            Direction::Down,
+        ));
+        if input_belt2.is_some() {
+            blueprint.add_entity(Entity::new_inserter(
+                InserterType::Long,
+                None,
+                Position::new(-5, 25),
+                Direction::Down,
+            ));
+        }
+
+        blueprint.add_entity(Entity::new_belt(
+            output_belt,
+            Position::new(-1, 13),
+            Direction::Down,
+        ));
+        blueprint.add_entity(Entity::new_belt(
+            output_belt,
+            Position::new(-1, 15),
+            Direction::Left,
+        ));
+        blueprint.add_entity(Entity::new_belt(
+            output_belt,
+            Position::new(-3, 13),
+            Direction::Left,
+        ));
+        blueprint.add_entity(Entity::new_belt(
+            output_belt,
+            Position::new(-3, 15),
+            Direction::Up,
+        ));
+        blueprint.add_entity(Entity::new_belt(
+            output_belt,
+            Position::new(-5, 13),
+            Direction::Left,
+        ));
+        blueprint.add_entity(Entity::new_belt(
+            output_belt,
+            Position::new(-5, 15),
+            Direction::Up,
+        ));
+
+        for i in 0..3 {
+            blueprint.add_entity(Entity::new_belt(
+                input_belt1,
+                Position::new(-5 + 2 * i as PositionType, 3),
+                Direction::Right,
+            ));
+            blueprint.add_entity(Entity::new_belt(
+                input_belt1,
+                Position::new(-1 + 2 * i as PositionType, 27),
+                Direction::Left,
+            ));
+            if let Some(beltspeed) = input_belt2 {
+                blueprint.add_entity(Entity::new_belt(
+                    beltspeed,
+                    Position::new(-5 + 2 * i as PositionType, 29),
+                    Direction::Right,
+                ));
+            }
+        }
+
+        blueprint.transform(Transformation::new(Direction::Up, Position::new(6, 0)));
+    }
+
+    if input_belt2.is_none() {
+        blueprint.transform(Transformation::new(Direction::Up, Position::new(0, -2)));
+    }
+
+    (
+        blueprint,
+        Position::new(
+            3 * assembly_machines.div_ceil(2) as PositionType
+                + if input_belt2.is_some() { 2 } else { 1 },
+            if input_belt2.is_some() { 15 } else { 13 },
+        ),
+        match (input_belt2.is_some(), assembly_machines % 2 == 0) {
+            (true, true) => 7,
+            (true, false) => 6,
+            (false, true) => 6,
+            (false, false) => 5,
+        },
+        if input_belt2.is_some() {
+            vec![1, 14]
+        } else {
+            vec![0]
+        },
+    )
+}
diff --git a/factorio-blueprint-generator/src/bin/assembly.rs b/factorio-blueprint-generator/src/bin/assembly.rs
index e36629a..6cc4553 100644
--- a/factorio-blueprint-generator/src/bin/assembly.rs
+++ b/factorio-blueprint-generator/src/bin/assembly.rs
@@ -1,6 +1,7 @@
 use clap::Parser;
 use factorio_blueprint::{BlueprintString, encode};
-use factorio_blueprint_generator::assembly::assembly_line;
+use factorio_blueprint_generator::assembly::{assembly_line, assembly_line_2_input};
+use factorio_core::beltoptions::Beltspeed;
 
 #[derive(Parser)]
 struct Args {
@@ -8,12 +9,22 @@ struct Args {
     json: bool,
     assembly_machines: usize,
     recipe: String,
+    output_belt: Beltspeed,
+    input_belt: Vec<Beltspeed>,
 }
 
 fn main() {
     let args = Args::parse();
     let b = BlueprintString::Blueprint(
-        assembly_line(args.assembly_machines, args.recipe).to_blueprint(),
+        assembly_line_2_input(
+            args.assembly_machines,
+            args.recipe,
+            args.input_belt[0],
+            args.input_belt.get(1).copied(),
+            args.output_belt,
+        )
+        .0
+        .to_blueprint(),
     );
 
     if args.json {
diff --git a/factorio-blueprint-generator/src/bin/generate_factory.rs b/factorio-blueprint-generator/src/bin/generate_factory.rs
index 417abb4..334fbd8 100644
--- a/factorio-blueprint-generator/src/bin/generate_factory.rs
+++ b/factorio-blueprint-generator/src/bin/generate_factory.rs
@@ -1,6 +1,8 @@
+use std::path::PathBuf;
+
 use clap::Parser;
 use factorio_blueprint::{BlueprintString, encode};
-use factorio_blueprint_generator::factory::generate_factory;
+use factorio_blueprint_generator::factory::{FactoryGraph, generate_factory};
 use factorio_core::prelude::*;
 use factorio_layout::{genetic_algorithm_v1::GeneticAlgorithm, valid_layout::ValidLayout};
 use factorio_pathfinding::belt_finding::ConflictAvoidance;
@@ -12,11 +14,18 @@ struct Args {
     seed: u64,
     #[arg(short, long)]
     json: bool,
+
+    path: PathBuf,
 }
 
 fn main() {
     let args = Args::parse();
 
+    let text = std::fs::File::open(&args.path).unwrap();
+    let factory_graph: FactoryGraph = serde_yaml::from_reader(text).unwrap();
+
+    dbg!(&factory_graph);
+
     let l = ValidLayout {
         max_tries: 10,
         retries: 20,
@@ -38,7 +47,9 @@ fn main() {
 
     let mut rng = SmallRng::seed_from_u64(args.seed);
 
-    let b = BlueprintString::Blueprint(generate_factory(&l, &p, &mut rng).to_blueprint());
+    let b = BlueprintString::Blueprint(
+        generate_factory(&l, &p, factory_graph, &mut rng).to_blueprint(),
+    );
 
     if args.json {
         println!("{}", serde_json::to_string_pretty(&b).unwrap());
diff --git a/factorio-blueprint-generator/src/factory.rs b/factorio-blueprint-generator/src/factory.rs
index df50d7f..1e7c764 100644
--- a/factorio-blueprint-generator/src/factory.rs
+++ b/factorio-blueprint-generator/src/factory.rs
@@ -3,85 +3,124 @@ use factorio_core::{beltoptions::Beltspeed, prelude::*};
 use factorio_layout::{Connection, Interface, LayoutInput, Layouter, MacroBlock};
 use factorio_pathfinding::Pathfinder;
 use rand::Rng;
+use serde::{Deserialize, Serialize};
 
-use crate::assembly::assembly_line;
+use crate::assembly::{assembly_line, assembly_line_2_input};
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct FactoryGraph {
+    pub subfactories: Vec<Building>,
+    pub factory_connections: Vec<FactoryConnection>,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub enum Building {
+    SubFactory {
+        recipe: String,
+        machines: usize,
+        machine: String,
+    },
+    ExternalConnection {
+        inputs: usize,
+        outputs: usize,
+    },
+    BeltPool,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct FactoryConnection {
+    pub item: String,
+    pub amount: f64,
+    pub from: usize,
+    pub to: usize,
+}
 
 pub fn generate_factory<L: Layouter, P: Pathfinder>(
     layouter: &L,
     pathfinder: &P,
+    factory_graph: FactoryGraph,
     rng: &mut impl Rng,
 ) -> Blueprint {
-    // 2 * gears
-    // 3 * copper wires
-    // 2 * green circuits
-    // 2 * inserter
-    let input = vec![
-        Interface {
-            offset: Position::new(0, 1),
-            dir: Direction::Right,
-        },
-        Interface {
-            offset: Position::new(0, 7),
-            dir: Direction::Right,
-        },
-        Interface {
-            offset: Position::new(0, 8),
-            dir: Direction::Right,
-        },
-    ];
-    let output = vec![Interface {
-        offset: Position::new(0, 0),
-        dir: Direction::Left,
-    }];
-    let blocks = vec![
-        MacroBlock {
-            size: Position::new(6, 9),
-            input: input.clone(),
-            output: output.clone(),
-        },
-        MacroBlock {
-            size: Position::new(9, 9),
-            input: input.clone(),
-            output: output.clone(),
-        },
-        MacroBlock {
-            size: Position::new(6, 9),
-            input: input.clone(),
-            output: output.clone(),
-        },
-        MacroBlock {
-            size: Position::new(6, 9),
-            input: input.clone(),
-            output: output.clone(),
-        },
-    ];
+    let mut blocks = Vec::new();
+    let mut blueprints = Vec::new();
+    let mut connections = Vec::new();
+    let mut used_connections = Vec::new();
 
-    let connections = vec![
-        Connection {
-            startblock: 0,
-            startpoint: 0,
-            endblock: 3,
-            endpoint: 0,
+    for b in &factory_graph.subfactories {
+        match b {
+            Building::SubFactory {
+                recipe,
+                machines,
+                machine,
+            } => {
+                assert!(machine == "assembly-machine-3");
+
+                let (b, size, y_output, y_inputs) = assembly_line_2_input(
+                    *machines,
+                    recipe,
+                    Beltspeed::Normal,
+                    Some(Beltspeed::Normal),
+                    Beltspeed::Normal,
+                );
+
+                blueprints.push(b);
+                blocks.push(MacroBlock {
+                    size,
+                    input: y_inputs
+                        .iter()
+                        .map(|&y| Interface {
+                            offset: Position::new(0, y),
+                            dir: Direction::Right,
+                        })
+                        .collect(),
+                    output: vec![Interface {
+                        offset: Position::new(0, y_output),
+                        dir: Direction::Left,
+                    }],
+                });
+
+                used_connections.push((0, 0));
+            }
+            Building::ExternalConnection { inputs, outputs } => {
+                blocks.push(MacroBlock {
+                    size: Position::new(1, (inputs + outputs) as PositionType),
+                    input: (0..*inputs)
+                        .map(|y| Interface {
+                            offset: Position::new(0, y as PositionType),
+                            dir: Direction::Left,
+                        })
+                        .collect(),
+                    output: (0..*outputs)
+                        .map(|y| Interface {
+                            offset: Position::new(0, (inputs + y) as PositionType),
+                            dir: Direction::Right,
+                        })
+                        .collect(),
+                });
+
+                blueprints.push(Blueprint::new());
+                used_connections.push((0, 0));
+            }
+            Building::BeltPool => todo!(),
+        }
+    }
+
+    for c in &factory_graph.factory_connections {
+        connections.push(Connection {
+            startblock: c.from,
+            startpoint: used_connections[c.from].0,
+            endblock: c.to,
+            endpoint: used_connections[c.to].1,
             lanes: 1,
-            beltspeed: Beltspeed::Fast,
-        },
-        Connection {
-            startblock: 1,
-            startpoint: 0,
-            endblock: 2,
-            endpoint: 0,
-            lanes: 1,
-            beltspeed: Beltspeed::Fast,
-        },
-        Connection {
-            startblock: 2,
-            startpoint: 0,
-            endblock: 3,
-            endpoint: 1,
-            lanes: 1,
-            beltspeed: Beltspeed::Fast,
-        },
-    ];
+            beltspeed: Beltspeed::Normal,
+        });
+
+        used_connections[c.from].0 += 1;
+        used_connections[c.to].1 += 1;
+    }
+
+    // dbg!(&blocks);
+    // dbg!(&connections);
 
     let l = layouter
         .layout(
@@ -94,13 +133,6 @@ pub fn generate_factory<L: Layouter, P: Pathfinder>(
         )
         .unwrap();
 
-    let blueprints = vec![
-        assembly_line(2, "iron-gear-wheel"),
-        assembly_line(3, "copper-cable"),
-        assembly_line(2, "electronic-circuit"),
-        assembly_line(2, "inserter"),
-    ];
-
     let mut b = Blueprint::new();
     for (block, mut assembly_blueprint) in l.positions.iter().zip(blueprints) {
         let offset = match block.dir() {