size(200, 200); background(0); stroke(153); int a = 20; int b = 50; int c = a*8; int d = a*9; int e = b-a; int f = b*2; int g = f+e; line(a, f, b, g); line(b, e, b, g); line(b, e, d, c); line(a, e+g, d-e, c+d);