Model 2012 Cannon

The Model 2012 Cannon is a simple cannon that fires 1 TNT, using 7 booster TNT to fire it. It is designed by PkmnTrainerMatt.

Materials Required The cannon is simple to build - Follow the picture above. Place TNT on the 7 blocks that are covered by the water flow (NOT THE SOURCE BLOCK!) and the half-block.
 * 60 of any solid block that does not obey gravity.
 * 16+ Redstone Dust
 * 8+ Repeaters
 * 1 bucket of water
 * 1 half-block
 * 1 transparent block (Glass)
 * Power Source (Preferably a Button)