const MapWid=80,MapHei=25
'static shared as long MapWid,MapHei
'MapWid = loword(width) : MapHei = hiword(width)
redim shared as byte Mapa(MapHei,MapWid)

screenres MapWid*8,MapHei*14
width MapWid,MapHei
locate ,,0

sub LabirintoRecursivo( iLin as long , iCol as long )  
    
  static as long iDirTab(3)={-1,1, 0,0}  
  dim as long iDir=int(rnd*4)
  for iDir = iDir to iDir+3
    
    static as long iDirLin,iDirCol,iNewLin,iNewCol
    iDirLin = iDirTab(iDir and 3) : iDirCol = iDirTab((iDir+2) and 3)
    
    iNewLin = iLin+iDirLin : iNewCol = iCol+iDirCol    
    if iNewLin < 2 or iNewLin >= ((MapHei-1) or 1) then continue for
    if iNewCol < 2 or iNewCol >= ((MapWid-1) or 1) then continue for
    if Mapa(iNewLin,iNewCol)<>0 then continue for
    if Mapa(iNewLin+iDirLin,iNewCol+iDirCol)<>0 then continue for
    
    Mapa(iNewLin,iNewCol)=1 : locate iNewLin,iNewCol : print chr(177);                    
    iNewLin += iDirLin : iNewCol += iDirCol
    Mapa(iNewLin,iNewCol)=1 : locate iNewLin,iNewCol : print chr(177);                    
    
    sleep 10 : LabirintoRecursivo(iNewLin,iNewCol)          
        
  next iDir  
  
end sub

do  
  color , 0 : cls : color 1+rnd*14,1+rnd*14
  clear Mapa(0,0),0,(MapWid+1)*(MapHei+1)
  LabirintoRecursivo(2,2) : sleep
loop