Rule:Greycells
@RULE greycells
https://conwaylife.com/forums/viewtopic.php?p=54217#p55151
Grey cells never die, and do not create life
state 0: OFF state 1: ON state 2: GREY
@TREE
num_states=3 num_neighbors=8 num_nodes=32 1 0 0 2 2 0 0 0 1 0 1 2 2 0 2 0 3 1 3 1 1 1 1 2 2 2 5 2 3 3 6 3 4 4 7 4 2 5 0 5 3 6 9 6 4 7 10 7 5 8 11 8 3 9 1 9 4 10 13 10 5 11 14 11 6 12 15 12 3 1 1 1 4 13 17 13 5 14 18 14 6 15 19 15 7 16 20 16 4 17 17 17 5 18 22 18 6 19 23 19 7 20 24 20 8 21 25 21 5 22 22 22 6 23 27 23 7 24 28 24 8 25 29 25 9 26 30 26
@TABLE
n_states:3 neighborhood:Moore symmetries:rotate8
var a={0,2} var b={0,2} var c={0,2} var d={0,2} var e={0,2} var f={0,2} var h={0,1,2} var i={0,1,2} var j={0,1,2} var k={0,1,2} var l={0,1,2} var m={0,1,2} var n={0,1,2} var o={0,1,2} var p={0,1,2} var q={1} var R={1} var S={1} var T={1}
- grey cell never changes
2,i,j,k,l,m,n,o,p,2
- 3-neighbour birth
h,R,S,T,a,b,c,d,e,1 h,R,S,a,T,b,c,d,e,1 h,R,S,a,b,T,c,d,e,1 h,R,S,a,b,c,T,d,e,1 h,R,S,a,b,c,d,T,e,1 h,R,a,S,b,T,c,d,e,1 h,R,a,S,b,c,T,d,e,1
- 2-neighbour survival
q,R,S,a,b,c,d,e,f,q q,R,a,S,b,c,d,e,f,q q,R,a,b,S,c,d,e,f,q q,R,a,b,c,S,d,e,f,q
- otherwise DIE
q,h,i,j,k,l,m,n,o,0
@COLORS
1 255 255 255 2 96 96 96