What happens next in this paragraph?

How to make a mega tic tac toe board
Unwrap shower curtain and lay on a flat surface.
It may be creased so consider doing this a few days before the party. If you don't have time to " de-crease " it days ahead of time, lay a sheet over the top and apply a warm iron to the sheet.
Create the tic-tac-toe lines with the tape. You will ultimately have nine boxes with the tape.