Your goal is to figure out what the missing link is (already figured out), and the correct way to figure it out (not figured out already). I would recommend you team up with other Scratchers to do this, as it requires both left thinking , right brain thinking and a tiny bit of crazy logic to solve. You will also need to find patterns and values between the shapes. You are allowed to ask me questions in the comments. I will only not answer if the answer gives away the riddle's solution. Good luck.
WHAT'S BEEN FIGURED OUT SO FAR: The answer is that the arrow points to the blue pentagon (now we need to figure out how to get that answer) The 7 is EXTREMELY important HINTS: There is math involved. Quite a bit of math. The colors aren't important at all, except for one step. There are 15 'steps'.