Hey, is your house being attacked by Zombies or creepers? Have no fear, Basil is here to help you MAJORLY. 

Today, we are making a auto-gun, that shoots roughly 50 - 100 RPM for arrows. Heres what you will need;

1 Despinser 

4 Redstone Repeater

5 - 10 Redstone Dust

1 lever

Once you have these materials, put the repeaters in a form to where it makes a circle. Put redstone to complete a circle. put a extended wire to a lever, and another to a despinser. load the gun with arrows and you will be ready to shoot 'em down! it should look like this :



Happy Defending!