This sketch can run up to 8 servos at one time. For this sketch there are 4 in the robot arm. This small sketch picks up a small wood peg, transfers it to the opposite side of 180 degree half circle and places it down. Arm travels to centre, waits, then returns to pick up the peg and puts it back to the original start point. It then travels to the centre and stays a while, then repeats the cycle again.