G21 ; Set units to millimeters G90 ; Use absolute positioning G17 ; Select XY plane ; Lift the head to 5mm above the material to avoid scratches G0 X0 Y0 ; Move to the starting position (optional if you're already at 0,0) G0 Z-0.23 F200 G1 Z0 F80 ; Lower the head to the material level at a feed rate of 80 G1 X-5 Y0 F80 G1 X-5 Y-5 F150 G1 X0