Use these tools to make cool light mazes. Use the arrow keys to angle objects when you are touching them. Drag to move. Objects: Saucer - Projects light. Mirror - Bounces light. White sensor - Senses for light. Yin-yang - Changes from light to dark, or vice-versa. Light square - Light only may pass. Dark square - Dark only may pass. BLack sensor - Senses for darkness.