Step 1: Preparing the stuff
Be creative !
So take some pieces of wood, clean and shape them at your taste, and make sure surfaces are flat and clean before gluing. You can use plywood too, it will make nice lines like a veneer sandwich, feel free to experiment. It's so easy you can try infinite combinations and shapes !
For these, i decided to make squares, and the fixation will be in a corner, so i cutted 45 degrees squares in my glued wooden sandwich, as shown on the picture.