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- 10 xu=-5 : xo=5 : yu=-5 : yo=5
- 20 sys 37173,"int(x)",xu,xo,yu,yo
- 30 :
- 40 yp=abs(yo/(yo-yu))*199
- 50 for xv=xu to xo
- 60 : xp=abs((xv-xu)/(xo-xu))*319
- 70 : for i=-3 to 3 : sys 38144,xp,abs(yp+i) : next i
- 80 next xv
- 90 :
- 100 xp=abs(xu/(yo-yu))*319
- 110 for yh=xu to xo
- 120 : yp=abs((yo-yh)/(yo-yu))*199
- 130 : for i=-3 to 3 : sys 38144,abs(xp+i),yp : next i
- 140 next yh
- 150 :
- 160 getz$ : if z$="" then 160
- 170 sys40211
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