View difference between Paste ID: k3B7tUKH and KJ35D3DN

 local xIni, yIni, zIni
 local xCur, yCur, zCur
 local fCur
 local posOut
 
 xIni, yIni, zIni = gps.locate(5)
 
 if not xIni or not yIni or not zIni then
   print("No or insufficient GPS hosts found")
-  close()
+  do return end
 end
 
 while not turtle.forward() do
   while not turtle.up() do
     turtle.digUp()
   end
 end
 
 xCur, yCur, zCur = gps.locate(5)
 if zCur > zIni then
   fCur = 0
 elseif xCur < xIni then
   fCur = 1
 elseif zCur < zIni then
   fCur = 2
 elseif xCur > xIni then
   fCur = 3
 else
   exit()
 end
 
 while not turtle.back() do
   while not turtle.up() do
     turtle.digUp()
   end
 end
 
 xCur, yCur, zCur = gps.locate(5)
 
 if not fs.isDir("data") then
   fs.delete("data")
   fs.makeDir("data")
 end
 
 posOut = io.open("data/pos.txt", "w")
 posOut:write(textutils.serialize({xCur, yCur, zCur, fCur}))
 posOut:close()