Help! I’m a beginner doing a pattern from yarnspirations, the red heart vertical ridges crochet hat for him. The beginning of the pattern is clear, as I’m going back and forth doing scbl, mixing sc and sl st to start the rows. It appears like a rectangle despite the picture not looking that way, and the final instructions are confusing as they say after 13 rows: “Ch 1. 1 scbl in each sc to last sc. work across ends of Unworked sts from previous 13 rows: (1 scbl in next sc. 1 sc next sl st) 6 times. Turn. 37 sc”. Then I’m supposed to repeat another 13 rows plus that instruction.
What does this mean? Can someone help me understand what to do in that last row?