AutoMining

local function checkFuel()
 local f = turtle.getFuelLevel()
 if f == 0 then
   print("Turtle fuel level is "..f)
   turtle.refuel()
 else
   print("Turtle fuel level is  "..f)
  end
end

local function putTorch()
  turtle.select(16)
  turtle.turnLeft()
  turtle.dig()
  turtle.place()
  turtle.turnRight()
end




local function mineShaft()
local level = 0
while true do
  if turtle.detectDown() then
    s,data = turtle.inspect()
    if s then
      print("detect "..data.name)
    end
    ---print("Testing")
    turtle.dig()
    turtle.digDown()
    turtle.down()
  else
    turtle.dig()
    turtle.down()
  end
  level = level+1

  if level % 5 == 0 then
    putTorch()
  end


  if (level >=40) then
    print("Current Level is ".. level)

    for i = 1, level+1 do
      turtle.digUp()
      turtle.up()
    end
    break
  end
end
end

----------------Main Program--------
checkFuel()
while true do
  local fuel = turtle.getFuelLevel()
  if fuel <100 then
    for i = 1,40 do
      turtle.digUp()
      turtle.up()
      if not turtle.detect() then
        turtle.turnLeft()
        if  not turtle.detect() then
          turtle.turnLeft()
           if  not turtle.detect() then
             turtle.turnLeft()
               if not  turtle.detect() then
                 break
               end
           end
        end
      end

    end
    break
  else
    turtle.forward()
    turtle.forward()
    mineShaft()
    for i=1,3 do
     turtle.dig()
     turtle.forward()
    end
  end
end