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18 lines
340 B
QBasic
18 lines
340 B
QBasic
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10 HGR:HCOLOR=3
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20 XC=50:YC=50:R=30:GOSUB 30
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25 END
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30 X=R:Y=0:P=1-R:GOTO 100
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40 Y=Y+1
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50 IF P<=0 THEN P=P+2*Y+1:GOTO 70
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60 X=X-1:P=P+2*Y-2*X+1
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70 IF (X<Y) THEN RETURN
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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 GOTO 40
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