int Hue, Saturation, i, j, n, NUM=20; int Square; void setup() { size(600,600); frameRate(30); smooth(); noStroke(); colorMode(HSB,360,100,100); n=NUM*NUM; Hue=0; Square=width/NUM; } void draw() { if(n==NUM*NUM){ n=-1; Hue=(Hue+29)%360; Saturation=(int)random(25,100); background(Hue,Saturation,50);} i=n%NUM; j=int(n/NUM); fill(Hue,Saturation, 100-200/NUM*max(abs(i-(NUM-1)/2.0),abs(j-(NUM-1)/2.0))); ellipse(Square*(0.5+i),Square*(0.5+j), Square,Square); n++; }