Persistence of Vision

I'm making a "Persistence of Vision" toy, which will show a programmed message like this in eight red light- emitting diodes.
In the lab we have a roll of copper foil backed with a conductive adhesive. I used a knife to cut out a hand shape. (In this case, I found it faster to work this way than to use the vinyl cutter.) I covered a small metal container with a vinyl sticker to insulate the foil board from the conductive tin. I soldered some surface mount LEDs and resistors onto the copper, and tomorrow I'll finish the rest of it.