main program
G54X0Y0Z10F100M03S100
R10=-15 R11=-9.06
L1
R10=15 R11=-9.06
L1
R10=0
L2
subprogram：
L1.SPF
G0 X=R10+12.5-4 Y=R11
G1 Z-6 F100
G3 I=4-12.5
G1 X=R10+8 Y=R11
G41 D1 X=R10+4 Y=R11
G2 I-4
G0 Z5
R1=4
R2=90
AAA:
R3=R1*COS(R2)+4+R10
R4=R1*SIN(R2)-R1
G0 X=R3 Y=R11
G1 Z=R4 F300
G2 I=R10-R3
G0 Z1
R2=R2-1
IF R2>=0 GOTOB AAA
G0 Z10
M17
L2.SPF
R1=35
R2=15
R3=0
G0 X=R1+R10 Y=R11
G1 Z-5 F100
AAA:
R4=R1*COS(R3)+R10
R5=R2*SIN(R3)+R11
G1 X=R4 Y=R5 F100
R3=R3+1
IF R3<=360 GOTOB AAA
G0 Z5
M17
