The document contains a G-code program for milling several pockets of increasing depth into a material using an end mill cutter in a repeating pattern across an area. The program runs the cutter at varying feed rates and depths in a zigzag pattern to cut successive layers at depths of 0.25mm, 0.5mm, 0.75mm, 1mm, 1.25mm, 1.5mm, and 1.75mm.