This is mine
1st round was "treble clusters" with 3 chains in between. Fasten off and turn work over.
2nd round was "treble clusters" with three chains in the corners and 1 chain for the side. Fasten off and turn work over.
3rd round normal trebles with three chains in the corners and 1 chain between clusters at the side.
Treble cluster at start of round = 3 chain, (one loop on hook) *yarn over hook, (two loops on hook) hook into chain space and draw through (three loops on hook) yarn over hook and draw through first two loops (two loops on hook). Repeat from *once more (three loops on hook) draw yarn through all loops.
Treble cluster for the rest of the round = don't start with the chain and work from **three times.
I can do photos if you need them.