Labyrinth Generator

size=15
wayLenght=20
minLenght=20
trys=0
avtrys=0

function newMap(size)
map={}
for x=1,size do
map[x]={}
for y=1,size do
map[x][y]=0
end
end
return map
end

function goForward(map,dir)
if x+2<=size and y+2<=size and x+2>0 and y+2>0 and x-2<=size and y-2<=size and x-2>0 and y-2>0 then
if dir==1 then
if map[x][y+2]==nil or map[x][y+2]==1 then return false else map[x][y+2]=1 map[x][y+1]=1 y=y+2 end
end
if dir==3 then
if map[x][y-2]==nil or map[x][y-2]==1 then return false else map[x][y-2]=1 map[x][y-1]=1 y=y-2 end
end
if dir==2 then
if map[x+2][y]==nil or map[x+2][y]==1 then return false else map[x+2][y]=1 map[x+1][y]=1 x=x+2 end
end
if dir==4 then
if map[x-2][y]==nil or map[x-2][y]==1 then return false else map[x-2][y]=1 map[x-1][y]=1 x=x-2  end
end
else
return false
end
end

function getPathLenght(map)
wert=0
for x=1,size do
for y=1,size do
wert=wert+map[x][y]
end
end
return wert
end

function writeMap(map,file)
shell.run("rm "..file)
fp=fs.open(file,"w")
size=#map[1]
for x=1,size do
for y=1,size do
fp.write(tostring(map[x][y]))
end
fp.write("\n")
end
fp.close()
end

while true do
way=newMap(size)
x=math.random(1,size)
y=math.random(1,size)
way[x][y]=1
for i=1,wayLenght do
goForward(way,math.random(1,4))
end
--writeMap(way,"weg")

if getPathLenght(way)>=minLenght then
paintutils.drawImage(way,1,1)
term.setBackgroundColor(colors.black)
term.setCursorPos(1,1)
term.write(trys)
avtrys=(avtrys+trys)/2
term.setCursorPos(1,2)
term.write(avtrys)
sleep(0.5)
term.clear()
trys=0
else trys=trys+1
end
end