8行迷路。誰かもっと縮めてくれぇ。

dim g,4,2:g=-1,0,1,0,0,-1,0,1:dim m,49,49:randomize:repeat 49:t=cnt:repeat 49
s=cnt:if ((s\2)+(t\2))=2{m.s.t=1:rnd r,4:a=s+g.r.0:b=t+g.r.1:m.a.b=1}loop:loop
gsel 0,-1:screen 2,10,10,8:repeat:repeat 10:b=cnt:repeat 10:a=cnt:d=a+v:e=b+w
palcolor 1-m.d.e*7:pset a,b:loop:loop:d=(k&4!0)-(k&1!0)+x:palcolor 39:stick k,15
e=(k&8!0)-(k&2!0)+y:r=(d<0)|(d>48):d=1-r*d+(r*x):r=(e<0)|(e>48):e=1-r*e+(r*y)
r=m.d.e:d=1-r*d+(r*x):v=1-(d>43)*(1-(d<5)*(d-4))+((d>43)*39):x=d:r=m.d.e:c++
e=1-r*e+(r*y):w=1-(e>43)*(1-(e<5)*(e-4))+((e>43)*39):y=e:if (x=48)&(y=48):break
pset x-v,y-w:redraw:title ""+c:wait 5:loop:dialog "cleared:"+c