Angles and curves create the perception of space.
background(255);
smooth();
size(500, 500);
translate(width/2, height/2);
randomSeed(1000);
int off = width/4;
int r = 10;
quad(
-off + random(-r, r),
-off + random(-r, r),
off + random(-r, r),
-off + random(-r, r),
off + random(-r, r),
off + random(-r, r),
-off + random(-r, r),
off + random(-r, r)
);
saveFrame("out.png");