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- 310 x=0:y=0
- 320 p2=peek(56320)
- 321 if (p2 and 1)=0 then y=-4
- 322 if (p2 and 2)=0 then y=+4
- 323 if (p2 and 4)=0 then x=-4:xb=2
- 324 if (p2 and 8)=0 then x=+4:xb=0
- 330 if x=0 and y=0 then 320
- 340 poke 2040,32+xb
- 345 gosub 500
- 350 poke 2040,33+xb
- 355 gosub 500
- 400 goto 310
- 500 bw=bw+x
- 501 cw=cw+y
- 505 if bw>344 then bw=0
- 506 if bw<0 then bw=bw+344
- 507 if cw>242 then cw=0
- 508 if cw<0 then cw=cw+242
- 510 bh=int(bw/256):bl=bw-bh*256
- 520 poke v+0,bl
- 521 poke v+1,cw
- 530 poke v+16,bh
- 560 for w=0 to 50:next
- 600 return
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