Our logo and motif is green, and I like the idea of a pulsing light. Currently the code fades the light in and out. I plan for it to evolve and incorporate a sensor that will detect if someone walks into the entranceway, and the light will pulse brighter, or change in a similar interactive way. The coolest part is that it could change, it doesn't have to be the same thing each day.
I programmed the Arduino with BlinkMFlash example code, and edited the code for this example. I've posted the code after the break: