void setup(){ size(500,200); } void draw(){ boolean dash = true; frame.setTitle(int(frameRate) + " fps"); for(int y = 0; y < height; y+=2){ for(int i = 0; i < width; i+=2){ if (dash) stroke(0); else stroke(255); line(i, y, i+5, y); dash = !dash; } } }