'NULL' VACANT
---------------------------
G01 X100. (Y#100);
---------------------------
#100 = 0;
#101 = 1;
#102 = #104;  ????

.........
#104 = 2;
G#100 X#101 Y#102;

#100 = #101;
#100 = #101 * 2;

#0;
#0;

IF [#100 EQ #0] THEN #100=0;
#100 = -50

------------------

%
O0010;
#100 = -40; (L D)
#101 = -40;
#102 = -40; (L U)
#103 = 40;
#104 = 40; (R U)
#105 = 40;
#106 = 40;  (R D)
#107 = -40;
#108 = 1;  (MIN Z)
#109 = 0.3;  (STEP Z -)
#110 = 20; (SLOTS / OPERATIONS)
#111 = 2; (MM / STEP)
G17 G90 G54 G40 G49 G80;
M06 T1;
G43 H1;
M03 S10000;
G00 X0.Y0.Z10.;
WHILE [#110 NE 0] DO 3;
G00 X#100 Y#101 Z4.;
G01 Z-#108 F100;
X#104 Y#105 F220;
G00 Z4.;
X#102 Y#103;
G01 Z-#108 F100;
X#106 Y#107 F220;
G00 Z4.;
#100=#100+#111;
#101=#101+#111;
#102=#102+#111;
#103=#103-#111;
#104=#104-#111;
#105=#105-#111;
#106=#106-#111;
#107=#107+#111;
#108 = #108 + #109;
#110 = #110 - 1;
END 3;
N100 M09;
M05;
G91 G28 Z0.;
G28 X0.Y0.;
G90;
M30;
%
-----------------------------------------------

1.2 SEC
13.28.15

133000
IF [#3012 GE 133000] THEN M00;