The Darkness was the name given to this hydrolic arm. It's controled using 6 syringes and an electric motor (rotation). The arm was built out of 1" x 1/2" balsa to keep things light. It had to stack blocks, place a pencil into a hole (shone), put a pool ball on a pedistol, and finally pick up a glass of water and pour it into another. Each event was timed, and we worked in teams. Our arm due to its simplicity took speed records in the block stack and pencil drop.