Onshape How To Make A Hinge

[@assemblyrequired39102]

This design will not work with 0 tolerace between the hinges.

[@airwick5083]

This is a very inefficient method of doing this: there are a ton of redundant steps, duplicated sketches, and this isn't leveraging any parametric relations.
If you are reading this please don't follow the advice given here, you can do much better!