--[[Version 1.0]]--
function fuelCheck()
  local fuelLevel = turtle.getFuelLevel()
  if fuelLevel < 16 then
    turtle.select(1)
    turtle.refuel(1)
    print("Refueled!")
  end
end

function chopTree()
  local success, data = turtle.inspect()
  if data.name == "minecraft:log" then
    print("Tree detected.")
    turtle.dig()
    turtle.forward()
    turtle.digDown()
    turtle.select(3)
    turtle.place()
    turtle.select(1)
    while turtle.detectUp() == true do
      turtle.digUp()
      turtle.up()
    end
    while turtle.detectDown() == false do
      turtle.down()
    end
  end
end

local chopping = true
while chopping do
  fuelCheck()
  chopTree()
  turtle.forward()
  turtle.forward()
end