I need a script to make a bolt 103 studs out and make an explosion at the end

Yep also draw a flow chart on what you plan to happen similar to the one you did in your previous post.

Otherwise there is insufficient information here. No one will be able to help further unless these are explained further:

Define bolt further such as if its model or part. Is arc the shape of the model or projectile trajectory of how you want it to move?

Ok so it starts from the origin so you can obtain the initial position from workspace.Core if its a model or part the method to obtain it will be different.

Also you need to define the direction you want it to to go, up down left right, random, etc.

Repeat the code using for loop or while loop.