How do you get that? I have been to radial heights and not got that

You have to do all the stars in order from the middle to the outside. If you mess it up you have to go back to the last one before you messed it up and then complete them in order.

Check out this vid on youtube if you need a visual. No matter how many times you mess up in one go just go back one and move forward in order again.
www.youtube.com/watch?v=D2a...