function fuelCheck()
    local fuelLevel = turtle.getFuelLevel()
    if turtle.getItemCount(1) < 1 then
        print("We are currently waiting to be refueled!")
        local waiting = true
        while waiting do
            if turtle.getItemCount(1) > 0 then
                print("Thank you!")
                waiting = false
                sleep(1)
            end
        end
    end
    if fuelLevel < 100 then
        turtle.select(1)
        turtle.refuel(2)
        print("Refueled.")
    end
end

function isLog()
    local success, data = turtle.inspect()
    if data.name == "minecraft:birch_log" then
        return true
    else
        return false
    end
end

function isSap()
    local success, data = turtle.inspect()
    if data.name == "minecraft:birch_sapling" then
        return true
    else
        return false
    end
end

 function plantTree()
    turtle.turnLeft()
    turtle.select(3)
    turtle.place()
    turtle.turnRight()
    turtle.select(1)
end

 function clean()
    turtle.suckUp()
    turtle.suck()
    turtle.turnLeft()
    turtle.suck()
    turtle.turnLeft()
    turtle.suck()
    turtle.turnLeft()
    turtle.suck()
    turtle.turnLeft()
    turtle.suck()
end

function mF()
    clean()
    turtle.attack()
    turtle.forward()
end

function mB()
    clean()
    turtle.turnLeft()
    turtle.turnLeft()
    clean()
    turtle.attack()
    turtle.forward()
    clean()
    turtle.turnLeft()
    turtle.turnLeft()
end

function chop()
    turtle.turnLeft()
    if isLog() then
        turtle.dig()
        turtle.forward()
        for i = 1, 10 do
            turtle.digUp()
            turtle.up()
        end
        for i = 1, 10 do
            turtle.digDown()
            turtle.down()
        end
        turtle.back()
        turtle.select(3)
        turtle.place()
    else
        if isSap() then
        else
            turtle.select(3)
            turtle.place()
        end
    end
    turtle.turnRight()
end

function check()
    for i = 1, 5 do
        fuelCheck()
        for i = 1, 10 do
            mF()
        end
        turtle.turnRight()
        mF()
        turtle.turnRight()

        for i = 1, 5 do
            chop()
            mF()
            mF()
        end
        mF()
        turtle.turnLeft()
        mF()
        mF()
        turtle.turnLeft()
        mF()
    end
end

function restart()
    turtle.turnLeft()
    for i = 1, 15 do
        turtle.attack()
        turtle.forward()
    end
    dropItems()
end

function dropItems()
    turtle.turnLeft()
    for i = 1, 16 do
        if i > 3 then
            if turtle.getItemCount(i) > 0 then
                turtle.select(i)
                turtle.drop()
            end
        end
    end
    turtle.turnRight()
    turtle.turnRight()
end

local chopping = true
while chopping do
    check()
    restart()
end