Script not working! Can you tell me why?

Hi there, i'm trying to script a color-changing part. I'm not sure why my script isn't working. If you know why it isn't working, please answer my question! I'm running on a deadline.

Thanks,

-Sniper Productions Lead Developer

Code:

local Part = script.parent
Part.BrickColor = BrickColor:Random()
wait (0.1)
Part.BrickColor = BrickColor:Random()
     end