VOP For Loop usage

The inputs of the VOP For Loop are a bit annoying.
Length - this is the number of loops to be made. It is the i<10 part of the loop.
Index - you don't have to set this unless you need to start with a value other than 0. eg, you want to start the loop with for(i=3;i<............)
The rest is just for any attributes/values you need to use.