O0001
#100 = 1200 (LENGTH)
#101 = 1200 (WIDTH)
#102 = 9.5 (STEP X/Y)
#103 = 132 (START X)
#104 = 242 (START Y)
#105 = FIX[#100/#102/2]
#106 = 1
G17 G21 G90 G54 G40 G49 G80 G94
M06 T1
G43 H1
M03 S6000
M08
G00 X#103 Y#104 Z20.
Z5.
G01 Z-#106 F120.
N50 IF [#105 EQ 0] GOTO 1000
G90
G01 X#103 Y#104 F200.
G91
G01 X#100 Z-#106
Y#101
X-[#100-#102]
Y-[#101-#102]
#100 = #100 - [#102 * 2]
#101 = #101 - [#102 * 2]
#103 = #103 + #102
#104 = #104 + #102
#105 = #105 - 1
#106 = #106 + 0.34
GOTO 50
N1000 
G00 Z20.
M09
M05
G91 G28 Z0.
G28 X0.Y0.
G90
M30