setup=()=>createCanvas(w=200,w)+pixelDensity(1)+background(w,a=15e4)
draw=()=>{loadPixels()
p=pixels.copyWithin(8e4+3,9,2e4)
for(x=0;x<159e3;x+=9+p[a])p[x-p[int(x/w)]]=(x/4%w)%8<5?w:0;
p[a]=++p[a]%w
p.copyWithin(p[a]<<3,8e4-(p[a]<<1),a)
updatePixels()}//#つぶやきprocessing