#101=400;
#102=510;
#103=0; (COORD Y)
#104=0; (COORD X)
#105=7; (STEP)
#100=25;

G90 G17 G21 G54 G40 G49;
T1 M6;
M3 S12000;
G43 H1;
N20 IF[#100 EQ 0] THEN M30;
G00 X#103 Y#104 Z10.;
Z5.;
G1 Z-4. F1200;
Y#101 F1000;
X#102;
Y#103;
X#104;

G00 Z20.;

#100 = #100 - 1;
#104 = #104 + #105;
#103 = #103 + #105;

#102 = #102 - #105;
#101 = #101 - #105;

GOTO 20;