And enjoy. p.s. you may want to use a better lock, I doubt my high school locker masterlock will last long.
Step 5: Create a hinge
cut the middle third of one of the frames' seat tubes out. hold it back in place and shove the seat post down through the tube, holding in the middle third of tube while allowing it to rotate freely. This will be welded as in the picture, allowing the welded attachment to rotate.