Step Three:

The corner of all the folds where there is no loose ends is going to be the center of the circle.
Take what ever size your pot is and divide that measurement by two. My net pots are 6", so my outcome is 3". ( 6 / 2 = 3 )
Now take that number and add 1/2" to it. So now my figure is 3 1/2".
Set your compass to this measurement and using that corner draw the 1/4 circle. ( If you don't have a compass, just measure out 3 1/2" from the corner, multiple times across the Panda Film, then connect the dots)