I'm sorry for the vague thread title, I don't really know how to explain what I am trying to achieve.
Ok, I am trying to make a certain item able to divide blocks, it want it to look somewhat like this:
The area the mouse is currently on will become gray, and when right clicked only the selected area will disappear, making the block then "broken".
How could this be achieved? Aesthetically, and coding wise.
Help would be greatly appreciated.