How to make a color gyro?

1, prepare three different colors of cardboard, here are red, yellow and green.

2. Cut the cardboard into circles with the same size, as shown in the figure.

3. Drill a hole the size of a pencil rod in the middle of the disc.

4. Keep a complete disc, and cut the other two, with moderate size.

5. Fix with double-sided adhesive tape.

6. Put a pencil stick or something on the CD.