4.

Kod programu:

N10 G21 G90 G94 M08
N20 T0606 M06
N30 S80 M03
N40 G00 X-20 Y0 Z2
N50 G01 X20 Z-2 F400
N60 X-20
N70 X-8
N80 X0 Y-3.5
N90 X8 Y0
N100 X0 Y3,5
N110 X-12 Y0
N120 X0 Y-7
N130 X12 Y0
N140 X0 Y7
N150 X-16 Y0
N160 X0 Y-10.5
N170 X16 Y0
N180 X0 Y10.5
N190 X-20 Y0
N200 X0 Y-11.5
N210 X20 Y0
N220 X0 Y11.5
N230 X-24 Y0
N240 X0 Y-11.5
N250 X24 Y0
N260 X0 Y11.5
N270 X-28 Y0
N280 X0 Y-11.5
N290 X28 Y0
N300 X0 Y11.5
N310 X-31 Y0
N320 X0 Y-11.5
N330 X31 Y0
N340 X0 Y11.5
N350 X-31.5 Y0
N360 X0 Y-11.5
N370 X31.5 Y0
N380 X0 Y11.5

N390 S120
N400 G42
N410 G01 X29.03 Y7.74
N420 G02 X29.03 Y-7.74 I-
2.03 J-7.74
N430 G01 X2.53 Y-14.67
N440 G02 X-2.53 Y-14.67 I-
2.53 J9.67
N450 G01 X-29.03 Y-7.74
N460 G02 X-29.03 Y7.74
I2.03 J7.74
N470 G01 X-2.53 Y14.67
N480 G02 X2.53 Y14.67
I2.53 J-9.67
N490 G01 X29.03 Y7.74
N500 G02 X29.03 Y-7.74 I-
2.03 J-7.74

N510 G40
N520 G01 X0 Y0
N530 Z50
N540 M30