Rube Golberg Machine #3

Whoa- when I was typing #3, the # was the shift version of 3! Maybe that signals that this machine is lucky? Anyway, this one was very short. Here it is:

In case you're a little bewildered, here's what was going on:
1) As I pull the string, I release the first ball to knock down the boards.
2) The last one pulls on a string which releases a second ball into a labyrinth.
3) When it falls out at the end, it pulls another string that pulls out a bar that is keeping a third ball from rolling down a ramp.
4) Lastly, the ball rolls into a auto lifter, which flips the ball up. It rolls to a stop at a book. It's done!

-Poohret