I used my knowledge of Arduino circuits and coding to create a design that had two buttons for two separate systems. I wanted one button to iterate through colored lights that represented each party member, and another to turn off those lights, and turn on a separate light that represented the enemy. The way I accomplished this was using interrupts. I had the interrupt be called when the special button was pressed, turning off the colored lights, and turning on the enemy light. The picture below is the partially completed circuit, as the lights had been removed to solder more wire length onto them.
Another problem that I encountered was lack of space on the protoboard that the class was using. Because of the amount of lights, resistors, and wires involved, there was simply no way to fit the circuit on the protoboard.
Arduino Protoboard