"Slinky" Spring Powered by 1 HP Lego Engine

I love to watch the Toy Spring "Slinky" shimmer, but I'm too lazy to do it myself.
Here is the video of how it works...

00:00 Slinky powered by Lego
00:32 Curious hamster is always ready to help
01:08 Let's add opposite gears
01:32 Time to power it by the Hamster Wheel
02:26 Reverse gearbox upgrade