F200 G0 X40 Y40 Z1 F100 G1 X40 Y40 Z-2 F100 G1 X80 Y40 Z-2 G1 X80 Y80 Z-2 G1 X40 Y80 Z-2 G1 X40 Y40 Z-2 G1 X40 Y40 Z2
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