Colors. Uses Pen. Hover your mouse over each corner to see or change different things. Color (top left): Changes the color of the trails. The sliders match the colors of the "Color" slider in the Scratch editor. The colors reset whenever you press the green flag. Speed (top right): Changes how fast the colors move. Stats (bottom left): Views the % of each color. Blue has the highest priority. (Order goes Red, Yellow, Green, Blue) This only works with the original colors, and without ghosting. Ghost (bottom right): Changes if there is a ghost trail, and if so, how much. Enjoy!