Minecraft Arrow Cannon

EPIC MACHINE GUN CANNON!

Below=EPIC FAILS

Step 1: Materials

2 powered rail, 1 detector rail, 1 minecart, 1 despenser, 2 redstone torches, and a LOT of arrows.

Step 2: How to Make It

If you are dumb and can't figure out how to make it by the pictures, then TOO BAD!

Step 3: Bigger One

This one was a bit bigger, but I wanted the other one.

You can make the track longer for a bigger delay.