rube goldberg machine

We have recently started making rube goldberg machines. I'm in a group so I am only doing part of it. My part is to make the beginning of it so I'm using an incline plane to hit a lever that will push a ball to go in a tube. After that my group member chris will make a pendulum that will hit a candle and burn the string to hit a ball. After that connor is making a wheel that will catch the ball, rotate the drop the ball which will hit the catapult.