how to make a bass TNT cannon in minecraft

1.put 3 slabs in a row like the picture above

2.make 6 dispenser like the picture

3.make the structure made out of any blocks just like this picture V

4.then put 2 dispensers above the corner slabs right/left its up to you

5.put waters between the 6 dispensers and the slabs

6.finaly do the redstone first put 2 redstone on the back right and left

7.put 1 repeater between the 2

8.then join everything up to a lever

9.finaly put 1 lever at the back of the 2 dispenser thats on the front

10.put 64 tnts inside each dispensers

THATS IT THE BASS CANNON! SHOOTS PRETTY FAR AND THE FIREPOWER IS SAME AS 2 TNTS! HAVE FUN WITH YOUR BASS CANNON!