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H=200
f=0
setup=draw=_=>{
createCanvas(w=500,w)
// background(255)
stroke(w)
s=0
for(y=-H;y<w+H;y+=d){
r=0
beginShape()
for(x=-H;x<w;x+=d){
n=noise(r/50,s/25,f*.004)
fill(d=10,60+n*H,w)
vertex(x,y+(n-.5)*2*H)
r++
}
endShape()
s++
}
f++
}
// function keyPressed() {
// saveCanvas()
// }