%
G21 G90 G40
G00 X-30 Y-30
G00 X-30 Y30
G00 X30 Y30
G00 X30 Y-30
G00 X-30 Y-30

G41.1 D10
G00 X-30 Y-30
G01 X-30 Y30
G01 X30 Y30
G01 X30 Y-30
G01 X-30 Y-30
G40

G42.1 D10
G00 X-30 Y-30
G01 X-30 Y30
G01 X30 Y30
G01 X30 Y-30
G01 X-30 Y-30
G40
%

