Draw on the cardboard, a tilted line,, the upper part must be narrower than the bottom; in this way, the iPad will rest properly without falling off
Trim following the stroke of the inclined line
Repeat the previous step on the other side of the box, the result should be similar to a mirror
Make a small cut in the bottom of each side to add one piece of media at a later
The supporting part, is a strip of cardboard, with two small cuts in the top left and right
Insert bracket into the cuts of the base part
And... Ready! You can place your iPad in horizontal or vertical way. I'm sorry because my English in not very good, blessings!