Dual Shot Cannon
- 21 Blocks (any kind)
- 8 Repeaters
- 7 Redstone Dust
- 5 Dispensers
- 1 Fence (any kind)
- 1 Wooden Pressure Plate
- 1 Sticky Piston
- 1 Button
- 1 Water Bucket
- Lots of TNT!
Place 5 blocks in 2 pillars, 1 3 blocks tall, the other 2 blocks tall; place a dispenser pointed toward the other pillar on the 2 block high pillar; place a fence in between the pillars; put a wooden pressure plate on top of the fence post.
Put 4 blocks going out of the fence post to form the bed of the cannon; make sure this is pointed the opposite way that you want the cannon to shoot.
Put 4 dispensers pointed toward the bed, opposite the first dispenser (make sure to hold shift when you place them, PC edition only); put 4 blocks opposite the dispensers.
Place 7 blocks in a ring, leaving 1 block open, the one by the 4 dispensers.
Place a sticky piston pointed upward in the gap of the ring; place a block on top of the piston.
Place redstone dust on top of the dispensers (hold shift while doing this to put the restone on top of the dispensers, PC edition only)
Make a clock circuit, with the repeaters set to 4 ticks, make sure they point out of the piston block.
Put 4 repeaters heading toward the original dispenser, make sure they are set to 4 ticks
Put a button on one of the 4 side dispensers; put water in the bed of the cannon; fill the dispensers with TNT!
You are ready to fire!