Relief Crochet Stitch
The quantity of sts is multiple 6 + 5 sts for the symmetry + 3 chain sts increase.
1st row: (1 double crochet, 2 chain sts, 1 double crochets) in the 6th st from the crochet hook, * 3 chain sts, skip 5 sts (1 double crochet, 2 chain sts, 1 double crochets)*; repeat from * to *, 1 chain st, skip the next st, 1 double crochet in the next st;
2nd row: 4 chain sts, skip the arch of 1 chain st, * 5 double crochets together in the arch of 2 chain sts, 3 chain sts, 1 half double crochet in the central st of the arch of 3 chain sts, 3 chain sts*; repeat from * to *, 5 double crochets together in the arch of 2 chain sts, 1 chain st, skip the arch of 1 chain st, 1 double crochet in the last st;
3rd row: 3 chain sts, 1 double crochet in the 1st st, * 3 double crochets, (1 double crochet, 2 chain sts, 1 double crochets) in half crochet*; repeat from * to *, 3 chain sts, 2 double crochets in the last st;
4th row: 3 chain sts, 2 double crochets between crochets, * 3 chain sts, 1 half double crochet in the central st of the arch of 3 chain sts, 5 double crochets together in the arch of 2 chain sts*; repeat from * to *, 3 chain sts, 3 double crochets together between the last 2 crochets;
5th row: 4 chain sts, * (1 double crochet, 2 chain sts, 1 double crochets) in half double crochet, 3 chain sts*; repeat from * to *, 1 chain st, 1 double crochet in the last crochet.
Repeat 2nd-5th rows.