Testing 3D, or 2.5D as it is technically. it is not printing a 3D object, rather, it is printing 2D objects in a pattern in order to appear 3D; If you click see inside, you can see that it is stamping the squares on top of eachother to make an object. Each step, the sprite changes its Y by stretch , and stamps. At the start of each frame, it clears the previous frame, so they do not overlap. Scratch does not officially support 3D, so you have to try make something look 3D, without using any 3D shapes. In this case, i just stamped a bunch of boxes on top of eachother to make it look 3D. An approach that some people take is actually drawing each thing with pen, to display it in a fashion that IS a 3D object. however, this is very hard, and requires lots of math and stuff, so i took the other approach, of simply stampin a 2D object. It looks alright, but it isn't as cool as some REAL 3D games
I got this method from others on scratch, who have done the same thing. i have no idea who was the first person to come up with the method, so i wont cedit anyone in particular