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- 5 scnclr
- 6 c=1
- 10 x = 24 : y = 50
- 20 z = 24 : k = 100
- 30 dx = 3 : dy = 3
- 40 dz = 5 : dk = 5
- 50 circle (x,y) ,10 ,1
- 51 c = c+1 : peno c
- 60 x = x + dx
- 70 z = z + dz
- 80 if x < 4 or x > 320 then dx = - dx
- 90 if z < 4 or z > 320 then dz = - dz
- 100 y = y + dy
- 110 k = k + dk
- 120 if y < 5 or y > 200 then dy = - dy
- 130 if k < 5 or k > 200 then dk = -dk
- 131 if c = 31 then c = 1
- 140 get a$ : if a$ = chr$ (13) then goto 160
- 141 if g=6 then goto 160
- 150 goto 50
- 160 g=6
- 165 c1=0
- 170 x1 = 24 : y1 = 50
- 175 z = 24 : k = 50
- 180 dx1 = 3 : dy1 = 3
- 185 dz = 5 : dk = 5
- 186 peno c1
- 190 circle (x1,y1) ,10 ,1
- 200 x1 = x1 + dx
- 205 z = z + dz
- 210 if x1 < 4 or x1 > 320 then dx1 = - dx1
- 215 if z < 4 or z > 320 then dz = - dz
- 220 y1 = y1 + dy1
- 225 k = k + dk
- 230 if y1 < 5 or y1 > 200 then dy1 = - dy1
- 235 if k < 5 or k > 200 then dk = -dk
- 250 goto 50
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