aho_02_alpha.pde

size(300,300);
background(100,100,255);

ellipseMode(CENTER_DIAMETER);
fill(255,255,255, 128);
ellipse(150,150, 200,200);
ellipse(200,200, 100,100);
ellipse(100,200, 100,100);
ellipse(150,150, 150,150);