Tps Forward pass (FwP): *Insert hook from right to left
behind front vertical bar, yarn over and pull up loop (see Figure), 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 loop through first
loop on hook, *yarn over and draw though 2 loops on hook: repeat from * to end,
ending with 1 loop on hook.