What You Did
You spun a wheel of colors so fast, that your eye only picked up a smudge or blur instead of individual slices of color.
When you spin the plate fast enough, the individual colors should disappear.
If the plate doesn’t spin very fast, the colors will not blur. Ask an adult to help if you still have trouble.
Try coloring another plate, but choose only a few colors. Divide the plate into six again, but color three slices red and three slices yellow, for example, and see what happens when you spin it.Try different media. I tried cut slices of construction paper.