Rotating Pi Symbol

π = 3.1415926535… 

We are all familiar with this irrational number obtained by dividing the circumference of any circle by its diameter. 
I built this as a functional display piece that rotates by turning a gear on the back. It can be customised by changing the patterns on it. 
This build used 250 pieces, although that is simply because I lacked certain pieces. For example, I have used two 1x1 bricks, because I could not find a 2x1 brick. 

Image attached to challenge
Winners announced
Ready, Set, Go STEM!

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