Step 6: Trapezoids?
Ok, this step isn't hard, though if you learn it through pictures it may be a bit confusing. I'll try my best.
First, turn the origami around so you can't see the square in the center.
Then, if you pull back one of the flaps, you'll see a crease going from a corner down. You will have to pop up this crease. The images may be sort of helpful for this.
Simply put a finger beneath the paper, right under the crease, and push upwards.
Reinforce the marked creases so the figure looks more 3D.
Do this to all four corners.