romanian crochet ccord No 7

Pattern : start  with 3 chain 
1 row - 1ch 3 sc ....12 chain -slst .
2 row - turn back end working in the chain 16 sc(single crochet ) slst( slip stitch).
3 row - turn back (se the video how) and 4 dc (double crochet)
12 chain & slst.
4 row -  turn back end working in the chain 16 sc(single crochet ) slst( slip stitch).
repeat the series 3-4 as many times as needed to complete your creation