Ejercicio cuadrados - Cruz

size(200,200);
background(0);

fill(#990000);
rect(20,20,40,40);

fill(#FF0000);
rect(40,40,40,40);

fill(#FF3333);
rect(60,60,40,40);

fill(#336600);
rect(140,20,40,40);

fill(#66CC00);
rect(120,40,40,40);

fill(#99FF33);
rect(100,60,40,40);

fill(#006666);
rect(20,140,40,40);

fill(#00CCCC);
rect(40,120,40,40);

fill(#66CCFF);
rect(60,100,40,40);

fill(#330033);
rect(140,140,40,40);

fill(#CC00CC);
rect(120,120,40,40);

fill(#FF66FF);
rect(100,100,40,40);