Abstract Thursday: Repetition

Ingeborg has chosen "Repetition" as today's AT challenge.

I thought I'd go for a triple whammy of repetition:

1) The repetition of layers in this onion slice
2) The repetition of the lines of grain on the chopping board

So what's the third? - you may ask. Well, if you eat a lot of strong raw onion the taste repeats again, and again, and again...!