Plain Text code - 4 lines

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Plain Text, pasted on May 9:

N10 G3 X0. Y-50. I50. J0.
N20 G3 X50. Y0. I0. J50.
N30 G3 X0. Y50. I-50. J0.
N40 G3 X-50. Y0. I0. J-50.