Choose one of these challenges as your design project:
Invent your own car company, then design a rotationally symmetric logo for it.
Design an alloy wheel, or wheel trim, which is rotationally symmetric.
Design an alloy wheel, or wheel trim, which is rotationally symmetric even when your company logo is included.
Most vehicle wheels are attached to the axle by 4 or 5 or 6 nuts (...and we are not talking about the mechanics!). Design an alloy wheel which is rotationally symmetric even when your company logo and the nut positions are included.