Start by pressing the Play button and choose a Halloween-themed image from the gallery. On desktop: Use your mouse to pick a color from the palette, then click and drag to color the picture. You can change the brush size using the size tool. Use the eraser to remove colors, the undo button to go back one step, and the save button to download your colored image. On mobile: Tap to select a color, then drag your finger across the screen to fill in the areas. Use the eraser to fix any mistakes. Adju