We need one script to select units or buildings. Currently, we have two that function independently. We want one. This script should highlight the unit that is selected. Using the 2x2 pixel sprite a rectangle should apear when the mouse button is dragged. This rectangle should have the same angle as the camera regardless of the direction its is pointing. The right mouse button will select the unit and the left mouse button will deselect. We need both buildings and units selectable
