turtle treefarm

function chopTree()
    turtle.dig()
    turtle.forward()
    local inspection = turtle.inspectUp()
    if inspection == false or inspection == nil then return end
    local counter = 0
    while inspection.name == "minecraft:log" do
        turtle.digUp()
        turtle.up()
        counter = counter + 1
    end
    for i=1,counter do
        turtle.down()
    end
    turtle.back()
    turtle.select(1)
    turtle.place()
    turtle.back()
    dropOff()
end

function dropOff()
    turtle.turnRight()
    turtle.turnRight()
    for i=3,16 do
        local detail = turtle.getItemDetail()
        if detail ~= nil and detail.name == "minecraft:sapling" then
            turtle.select(i)
            turtle.refuel(64)
        elseif detail ~= nil then
            turtle.select(i)
            turtle.drop()
        end
    end
    turtle.turnRight()
    turtle.turnRight()
end

function checkTree()
    turtle.forward()
    local inspection = turtle.inspectUp()
    if inspection == false or inspection == nil then
        turtle.back()
        return
    end
    if inspection.name == "minecraft:log" then
        chopTree()
    end
    turtle.back()
end

while true do
    checkTree()
    sleep(5)
end