Tss forward pass (FwP): *Insert hook from right to left
behind front vertical bar (Figure 1), yarn over and pull up loop (Figure 2),
leave loop on hook; repeat from * to last vertical bar at edge, pick up front
and back loops of last bar to create firm edge; return pass.
Return pass (RetP): Yarn over and draw through first loop on
hook, *yarn over and draw through 2 loops on hook (Figure 3); repeat from * to
end, ending with 1 loop on hook.