Use the fan instructions in the yellow mini sets to build a mechanism to spin a circle very fast.

Two black connectors in two beams with two plates between for stable horizontal to vertical stability.
Axles are measured by how many studs long they are.

Gear 1:5 or 1:25.
Add papers with two primary colors

and turn fast.

Red and blue is purple.  Yellow and blue is green.

Pretty designs


Outside is red and blue makes purple,
middle is blue and yellow makes green,
and
near the center is red and yellow makes orange.