Designing A Product - Looking For A Specific Type Of Illusion!

Hi everyone!

I am researching optical illusions. I'm currently developing a product that spins. It's quite small, 5-6cm in diameter.

I want to laser etch a pattern onto the product that will create an illusion when the product is in use/spinning.

I'm completely new to the world of illusions, but I have seen some very interesting ones so far. I'd love to get some feedback on your favourite illusions that fit the criteria above!