It's very clean but not really so simple: even with a stamp-a-ma-jig, it's pretty hard to get the stamps all lined up and stamped perfectly each time. I actually had to call one a prototype and make a second!
I added a pearl to the centre of each motif, just to add a bit more interest in a subtle way.
Card: Whisper White, scrap of Marina Mist
Stamps: SU Hello Lovely (retired) and Hero Arts Thank You
Ink: Marina Mist
Other: Pearls, corner rounder punch, stamp-a-majig.