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19 lines
341 B
QBasic
19 lines
341 B
QBasic
10 HGR:HCOLOR=3
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20 XC=50:YC=50:R=30
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30 X=0:Y=R:D=3-2*R:GOSUB 100
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40 X=X+1
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50 IF D>0 THEN Y=Y-1:D=D+4*(X-Y)+10:GOTO 70
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60 D=D+4*X+6
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70 GOSUB 100
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80 IF Y>=X THEN 40
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99 END
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100 HPLOT XC+X,YC+Y
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110 HPLOT XC-X,YC+Y
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120 HPLOT XC+X,YC-Y
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130 HPLOT XC-X,YC-Y
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140 HPLOT XC+Y,YC+X
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150 HPLOT XC-Y,YC+X
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160 HPLOT XC+Y,YC-X
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170 HPLOT XC-Y,YC-X
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180 RETURN
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