In the 3rd chain from the hook, work SC, CH 1, SC. *Skip one chain, then SC, CH 1, SC into the next chain. Repeat from * across the row until 2 chains remain. Skip 1 chain, then end in the final chain with 1 SC. CH 2 and turn.
In the first chain one space of the previous row, work SC, CH 1, SC. *Skip 2 stitches, then work SC, CH 1, SC into the next chain 1 space. Repeat from * across the row ending with 1 SC in the top of the turning chain (or into the space made by the turning chain if that is easier.) CH 2 and turn.
REPEAT ROW 2
See video tutorial below.