Despite containing bobble stitches, this is a fairly basic square. It is only 2 rounds
Bobble = work 5tr until 1 loop of each remains on hook, yo and draw through all 6 loops on hook
Base Ring: Using A, ch4, join with slip st
Round 1: Using A, ch4, work 4tr until loop of each remains on hook, yo and draw through all 5 loops on hook (counts as 1st bobble), ch4, * [bobble, ch4 into ring] 7 times, slip st to top of 1st bobble. Fasten off A
Round 2: Join B to a ch-4 sp, ch3 (count as 1dc), 3dc into same sp, * 4dc into next sp, ch6, 4dc into next sp; rep from * twice more, 4dc into next sp, ch6, slip st to top of ch-3.