Stray's turtle-tunnel

function endCheck()

   if turtle.getItemCount(15) == 0 then
      turtle.select(15)
      turtle.digUp()
   end
   if turtle.getItemCount(16) == 0 then
      turtle.select(16)
      turtle.digUp()
   end
end

function endFuel()
   h = 1000
   i = 0
   while i == 0 do
      if turtle.getFuelLevel() > h then
         i = 1
      else
         turtle.select(16)
         j = 0
         k = 1
         while k > j do
            turtle.digUp()
            if turtle.placeUp() == true then
               j = 2
            end
         end
         turtle.select(14)
         while turtle.getItemCount(14) > 0 do
            turtle.dropUp()
            sleep(1)
         end
         turtle.select(16)
         turtle.digUp()
         l = 0
         m = 1
         turtle.select(15)
         while m > l do
            turtle.digUp()
            if turtle.placeUp() == true then
               l = 2
            end
         end
         turtle.select(14)
         turtle.suckUp()
         while h > turtle.getFuelLevel() do
            turtle.refuel(10)
            sleep(1)
         end
         i = 1
         turtle.select(15)
         turtle.digUp()
      end
   end
end


function endStorage()
   c = 13
   d = 0
   e = 0
      if turtle.getItemCount(13) > 0 then
         turtle.select(16)
         g = 1
         f = 0
         while g > f do
            turtle.digUp()
            if turtle.placeUp() == true then
               f = 2
            end
         end
         while c > d do
         e = e+1
         turtle.select(e)
         turtle.dropUp()
         while turtle.getItemCount(e) > 0 do
            turtle.dropUp()
            sleep(1)
         end
         if e == 13 then
            d = 14
         end
      end
      turtle.select(16)
      turtle.digUp()
   end
end

function bDig()
   turtle.select(1)
   a = 1
   b = 0
   turtle.digUp()
   turtle.digDown()
   while a > b do
      if turtle.detect() == false then
         if turtle.forward() == false then
            for i = 1,5 do
               turtle.attack()
            end
            turtle.forward()
         end
         b = 2
      else
         turtle.dig()
      end
   end
end

print("Put your enderchest for storage in slot 16 and an enderchest in slot 15 for fuel")
sleep(10)
endCheck()
while true do
bDig()
endStorage()
endFuel()
end