So here are the first 2 rounds.
SQUARE # 1
It is 4 little squares of only the first 2 rounds (above).
Rnd 3 – hdc in each dc and the corners are: 2 hdc, ch 2, 2hdc.
I used hdc so that when they are assembled, the resulting square is the same size as the other three.
SQUARE # 4
Rnd 3 – same as Round 4 of square #3.
Rnd 4 – sl st to and into next ch 2 sp, ch 3, make 1st corner, V st between next 2 dc of previous rnd, 5 dc in next V st, V st between next 2 dc of previous row, make 2nd corner (13 dc on each side) continue around. Join as before.
Rnd 5 – sl to and into next ch 2 sp, ch 3, make 1st corner, 5 dc in V st of previous row, V st in 3rd dc of 5 dc in previous row, 5 dc in next V st, make 2 nd corner. Continue around and join as before. (16 dc on each side)
Rnd 6 – sc in each stitch around, making the corners as before, but in sc.
Rnd 7 – sc in each st around except do 5 sc in each corner.