20 DIM NEWFROM(4):NEWFROM(1)=3:NEWFROM(2)=4:NEWFROM(3)=1:NEWFROM(4)=2
40 OLD(1,2)=200:OLD(1,3)=186:OLD(1,4)=188
50 OLD(2,1)=200:OLD(2,3)=201:OLD(2,4)=205
60 OLD(3,1)=186:OLD(3,2)=201:OLD(3,4)=187
70 OLD(4,1)=188:OLD(4,2)=205:OLD(4,3)=187
80 NEWX(1,2)=205:NEWX(1,3)=186:NEWX(1,4)=205
90 NEWX(2,1)=186:NEWX(2,3)=186:NEWX(2,4)=205
100 NEWX(3,1)=186:NEWX(3,2)=205:NEWX(3,4)=205
110 NEWX(4,1)=186:NEWX(4,2)=205:NEWX(4,3)=186
111 FOR I=0 TO 1999:POKE 2*I,219:NEXT I
120 FOR I=0 TO WL-1:POKE 2*(5*80+I),205:W(I,1)=5:W(I,2)=I:NEXT I:H=WL-1:F=4
140 ND=1+INT(RND*3.999999):WHILE ND=F:ND=1+INT(RND*3.999999):WEND:IF (ND=1 AND W(H,1)=0)OR(ND=2 AND W(H,2)=79)OR(ND=3 AND W(H,1)=24)OR(ND=4 AND W(H,2)=0)THEN GOTO 140