It may be wrong at some points of time but otherwise it works TNIF - Totally New Image Format (not TIFF) Press Space to start drawing. To export your TNIF, export the A and B lists. Then load them back correctly for loading. To replay the drawing, press the up arrow.
I saw something similar and remade it without using it If you wanna post your images send it to the TNIF Studio and make a project with the TNIF codes (A and B lists)