shifting form

at first I was trying to make a sketch book that would have triangle pages and be more sculptural at the same time. I have created this shape shifting object that when twisted forms a tetrahedron then can be flattened. I stumbled upon this animation of  form by accident  and I think it works well enough as an object in its own right without doodles to ruin it. 
it is made by cutting a square out with a scalpel folding into 4 on the diagonals and on one fold cut into the middle. then you have a tab that fits perfectly into the triangle. repeat this and place on to glue the square on with the tab rotated 90degres the result is the vidio you see below. the sketches are of the same build but i zig/zag the folds. this form had a sort of liquid motion about it with a rigidity in the center.