[Windell] from Evil mad scientist Laboratories took one of their Peggy 2 kits and gave it a little upgrade. The Peggy 2 is a programmable 25×25 LED display. It’s Arduino compatible and can accommodate big 10mm LEDs. many people assemble them using just one color, but [Windell] chose to create huge RGB pixels by placing discrete red, green, blue, and white LEDs next to each other in the board. This creates a 12.5×12.5 grid of full color pixels. It’s an interesting effect and you ought to certainly check out the video embedded below which shows how the transition can be smoothed using a diffuser.