Great work Dave! 1008 pixels, wow! I like how you converted in ASM the bit testing for the "bit banging" part.
But you cannot just post some code, we want proof! Show the video! It's easy: there's a thing called "the Internet" and there's a place named "YouTube"...

Just before Christmas I designed a Christmas tree ornament and sent the Gerber files to Dirty Cheap PCB. It was a fun project and the result is nice: