SolvedWAND TOOL

I've been using wand tool for quite long now, and it's pretty impressive. I can do //set, but I can't do //fill.
When using //fill, it asks me for radius. Now im not really good at math, so anyone could tell me the easiest way of finding out the radius of my area?
If you need an example, here it is:
I want to fill in an area of 8x8.

Use //replace <block1> <block2>

Fill is a tool - it is bound to a block. Wherever you click with that tool makes a block of whatever radius you specified.
So if you had a fill 5 tool, it would make a 10 block diameter sphere where you clicked.

No, just use //replace <block to replace> <block replacing with>

//fill just makes small spheres where you click.