Rainbow Medallion Card

I made this card for a challenge but didn't like it enough to submit it.  The challenge was to use a stamp not designed for medallions and create a rainbow medallion with it.  I used my stamping gear wheel for it, and didn't notice in time that the placing of my stamp wouldn't be properly spaced in the circle for the corners, so the cardinal directions stamped right but the corners are slightly off (the pink being the most noticeable).  I finished the card with a die cut circle and white stamped sentiment.