iGorr checks the names of all blocks it can reach through the GridTeminalSystem. It searches through each name for a unique peice of text, which is provided by the user in the form of a Run Argument in iGorr's progemmable block. IGorr uses this search to determine which visible grids or subgrids should be affected.

The Run Argument that you provide to the programmable block is considered the GridTag. That is the peice of text iGorr looks for in the names of all blocks it can "see." Each block that has this GridTag in its name is a marker saying, "The grid I'm in is part of that script's territory." So, more than one tagged block in a grid is unnessacery.

CubeGrids:
Any set of directly connected blocks is called a CubeGrid. Rotors and Pistons create new CubeGrids that act as though they are fully part of the base grid. These subgrids must be marked by the user in order to be affected by iGorr.

Setup:
Only one block in each CubeGrid needs to have this given Run Argument in its name. The grid that has iGorr on it must have the given Run Argument in the name of one block as well.