The robot used a conveyor-belt system with flaps, powered by a servo motor, to push balls up a vertical slope. The slope guided each ball to the top of the robot, where it was deposited into a hopper. The hopper featured an opening regulated by a solenoid, controlling the flow of balls onto the pyramid structure below. The pyramid frame temporarily held the balls in place as they were stacked. Once the pyramid was complete, the robot retracted, leaving the structure freestanding. This mechanism allowed precise collection, controlled delivery, and accurate stacking of the balls during the task