Where could I find the color squares to print for the rvr?
You should have received a set of the color squares inside of your Sphero RVR kit but if you are a returning team, you might have lost or thrown away the color squares.
Regardless of whether you have the Sphero RVR color squares, you can make your own color squares with whatever colors you would like to use for your practice court. When you get to the competition events, you will need to recalibrate the RVR color sensor to align with the color squares which will be on the competition courts. This recalibration will be beneficial for all teams at the competition events, since different lighting at the competition venue might be different from your practice settings. You can find more information at the Sphero website: Sphero Edu