Can someone help me understand this bit of the pattern? The bold part is the part I’m confused by. Thank you!
Beg with a K row and working in st st throughout, inc 1 st at each end of 3rd and 0 [4:8:0:4:4)] foll - [RS:4th;-4th;4th] rows then on every foll RS [4th;6th;4th;6th;6th] row to 55 [57;57;63;63;67] sts.