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function setup(){createCanvas(s=600,s)}function draw(){background(0),noStroke();for(let $=0;$<=s;$+=25)for(let t=0;t<=s;t+=25){let _=sin($)*sin($)-cos(t)*cos(t)-a,e=map(_,-1,1,0,255);fill(e,255,e),ellipse($,t,e/10)}(a+=n)>2&&(n=-.01),a<-2&&(n=.01)}a=-2,n=.01;//#つぶやきProcessing