ejercicios de capas

size(480,120);
rect(160,30,260,20);
ellipse(140,8,190,190);

size(480,120);
smooth();
stroke(#99FF00);
ellipse(140,8,190,190);
rect(160,30,260,20);

size(480,120);
smooth();
ellipse(140,8,190,190);
stroke(#99FF00);
rect(160,30,260,20); 

size(480,120);
smooth();
stroke(#99FF00);
strokeWeight(20);
ellipse(140,8,190,190);
rect(160,30,260,20);