Making sure that all cross sections meet at the center stake you will need to run rope from each corner to the opposite side. You will continue this until you have about 6 inch sections along the outside edge.
To make it easier I started in the corners, then cut each section in half, and continued to divide each section in half until I had obtained 6 inch sections along the edge of the web frame.
Starting in the center, you will need to take yarn and tie a knot at each cross section around the center stake. Once you've made about 2 or 3 circles around the center stake you will be able to remove the stake to get it out of the way.
The center circles should start at about 1/2 of an inch apart.
Second to last step in this process is to find some fabric glue (available at most fabric stores) and in order to keep the center rounds in position; you will need to glue each and every knot in place.
Once you've finished gluing you will need to let the glue dry.