Minecraft PE Throwing Fireballs with Commands

In Minecraft PE, sometimes I get so tired of Ghasts shooting fireballs at me, so I made the Throwable Fireball Machine! 

To do this, first get one to three command blocks (check out one of my earlier posts on command blocks if you don't know how to do this), then place them.  Make one of them always active. Then type this in to the command block that is always active:

/tp @e[type=fireball] @e[type=snowball]

This will make it so when you throw a snowball, a Ghast fireball will teleport to the same spot as the snowball, and it will be thrown in the same direction, and it doesn't fall down like a snowball does. 

The next command block in the machine is optional. Make one of the command blocks that you placed repeat and always active.  Then, type this in the new command block:

/tp @e[type=fireball] ~ ~2 ~

This command will teleport the fireball to right above the command block, until you throw it.  This is helpful so when the Ghast shoots the fireball, you will not accidentally get attacked.  Remember, you don't have to do this one.

The next command block in the machine is also optional.  First, make a command block repeat and always active, just like before, then type this in the command block:

/tp @e[type=ghast] ~ ~1 ~

This will teleport the Ghast in one spot, so that way it won't be far away from you, which would make it harder.  Just remember, you don't have to do the last two command blocks if you don't want to.  It just sometimes makes it easier.

Anyways, that's it for today!  Goodbye! =(