ramdomwalkって知らなかった。

Another snow in April

Variation: GBZ

startshape main
background{sat .1 b -.1}
tile{s 2}

rule main {
  10 * {} randomwalk {}
}
 
rule randomwalk {
  randomwalk {x 1 r 222}
}
rule randomwalk {
  randomwalk {x -1 r -100}
}
rule randomwalk .1 {
  SNOW {sat .1 b .3}
} 

rule SNOW {
  TRIANGLE {}
  SNOW {r 80 x .001 s .99 b .01}
}