A granny squircle......

Is it a square? Is it a circle? It's actually a bit of both!

Pattern:
Round 1 - 6 pairs of treble crochets separated by 1 chain
Round 2 - In the 1 chain spaces from the previous round work 3 trebles separated by 1 chain
Round 3 - In each 1 chain space from the previous round work 2 sets of 2 trebles each separated by 1 chain (12 sets of 2 trebles)
Round 4 - In each 1 chain space from the previous round work 3 trebles separated by 1 chain
Round 5 - In the 1 chain spaces from the previous round work 4 trebles separated by 1 chain
Round 6 - Slip stitch to the first chain space, chain 5, work 2 treble treble crochets, 3 chains, 3 treble treble crochets, * chain 1, 3 treble crochets in the next chain space, chain 2, treble crochets in the next chain space, chain 1, 3 treble treble crochets, 3 chains, 3 treble treble crochet in the corner, continue from * around
Round 7 - Work 3 treble crochets in each chain space, separated by 2 chains, work 3 tc, 2 ch, 3 tc in each corner space
Round 8 - Work a round of double crochets, one in each stitch from the previous round, with 2 dc, 2 ch, 2 dc in each corner space, finish off.