protected override void draw()
{
background(255);
layout2D();
fill(color(0, 0, 255));
shape(square, 25, 25);
shape(circle, mouseX, mouseY);
fill(color(255, 0, 0));
shape(square, 25 + width/2, 25);
for(int i=0; i<4; i++) {
star.fill(color(255, 255, 255 - i * 60));
shape(star, 100 + width / 5 * i, 100 + 100 * i);
}
}