O0001
#101 = 1485.562
#103 = 12
G17 G54 G21 G40 G49 G80
M03 S10000
G43 Z10. H1 
#102 = 0
#100 = FUP[#101/2/#103]
G00 X#102 Y#102 Z5.
G01 Z-1. F100.
M08
N20 IF [#100 EQ 0] AND [#102 GE 200] GOTO 50
G90
G01 X#102 Y#102
G91 
Y#101 F125.
X#101
Y-#101
X-#101
G90
#102 = #102 + #103
#101 = #101 - [#103*2]
#100 = #100 - 1
GOTO 20
N50
M05
M09
G91 G28 Z0.
G28 X0.Y0.
G90
M30