newmtl white
Ka 0 0 0
Kd 1 1 1
Ks 0 0 0

newmtl green
Ka 0 0 0
Kd 0 1 0
Ks 0 0 0

newmtl blue
Ka 0 0 0
Kd 0 0 1
Ks 0 0 0