Press the flag to start it, and 5 to set brightness to 50. Only give it the first letter of the backdrop color you want. The circle shows what the color will look like. Just press or drag to change the color of the squares. Turbo mode recommended. Arrow keys will change the color and brightness. Up and down for brightness, and left and right to set the color. N for eraser. F to turn eraser off. R for red, O for orange, Y for yellow, G for green, B for blue, and P for purple. If your cursor is not coloring any blocks, make sure your eraser is not on. To do that, press F. Press space to iron.
Nothing really, I just made this myself.