Tunnelfun2

function fuelLevel()

 if turtle.getFuelLevel() < 1000 then

  turtle.select(1)

  turtle.refuel(8)

  print("Refueled")

 else

  print("Enough Fuel")

 end

end



function mine()

 while turtle.detect() do

  turtle.dig()

  sleep(0.5)

 end

 turtle.forward()

 while turtle.detectUp() do

  turtle.digUp()

  sleep(0.5)

 end

 turtle.digDown()

end



function checkFull()

 if turtle.getItemCount(16) > 0 then

  turtle.back()

  turtle.down()

  turtle.digDown()

  turtle.select(3)

  turtle.placeDown()

  for i = 4,16 do

   turtle.select(i)

   turtle.dropDown()

  end

  turtle.select(2)

  turtle.up()

  turtle.forward()

 end

end



print("Place fuel in slot 1, torches in slot 2, and chests in slot 3!")

print("How wide will the tunnel be?")

local x = read()

print("How long will the tunnel be")

local y = read()


turtle.select(2)

turtle.placeDown()

for i = 1, y do

  for i = 1,9 do

   turtle.select(2)

   fuelLevel()

   checkFull()

   mine()

   turtle.turnLeft()

   for i = 1,((x/2)-0.5) do

    mine()

   end

   turtle.turnLeft()

   turtle.turnLeft()

   for i = 1,(x-1) do

    mine()

   end

   turtle.turnLeft()

   turtle.turnLeft()

   for i = 1,((x/2)-0.5) do

    turtle.forward()

   end

   turtle.turnRight()

  end
 end

 turtle.select(2)

 turtle.placeDown()


print( "Returning to start..." )
-- Return to where we started
for i = 1, y do
    turtle.back()
end