stroke(255); background(51); color from = color(204, 102, 0); color to = color(0, 102, 153); color interA = lerpColor(from, to, .33); color interB = lerpColor(from, to, .66); fill(from); rect(10, 20, 20, 60); fill(interA); rect(30, 20, 20, 60); fill(interB); rect(50, 20, 20, 60); fill(to); rect(70, 20, 20, 60);