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%
O100
#23=1
#7=#7/2
#19=#18
#5=[#1-#3]/2
WHILE[#23LE#11]DO2
#16=#21+[#23-1]*#22
#24=#7*COS[#16]
#25=#7*SIN[#16]
#6=#5+#24
G0 X#24 Y#25
G0 X#6 Y#25
#18=#19
Z[#18+6.]
G1 Z#18 F[#9*0.2]
WHILE[#18GT#26]DO1
#18=#18-#17
IF[#18LE#26] THEN #18=#26
G3 I-#5 Z#18 F#9
END 1
I-#5 F[#9*0.6]
G1X[#6-1.] Z[#18+0.1]
G0 Z30.
#23=#23+1
END2
Z200 G0
M99
%