8 cubes in one AMF file for multicolor print head

This is simply one 10mm cube that I duplicated 8 times vertically, at same XY, but incremented the Z location by 10 each time. Then I imported all 8 stl's into Slic3r and saved it as this AMF file. So when you bring it into Repetier or another 3d printer controlling software, you can assign different colors to the different objects within this group. You can also delete cube 8, 7 , 6 etc if you want to make a shorter stick, as seen in photo.
Or you can scale this group either to make real short