Rule:Orbs

@RULE Orbs

1. A 4-state von Neumann rule designed for simple computation.
2. It has 4-celled photons, or "Orbs", get bounced between blocks and other orbs.
3. They split and collide To compute things and give us an interesting show.

@COLORS 0 48 48 48 Space 1 255 0 0 Block 2 255 128 0 Wing 3 255 255 0 Head

@TABLE n_states:4 neighborhood:vonNeumann symmetries:permute

var a={0,1,2,3} var b=a var c=a var d=a

1. Split

 0 1,3,1,0 3 # pass through
 

1. Reflect

 var A={1,2} #  block/wing
 0 3,A,2,0 3 # turn head
 0 3,A,c,d 2 # move wing forward

1. Move

 0 3,b,c,d 3 # move head forward
 var A={2,3} #  wing/head
 A a,b,c,d 0 # remove old orb