Strip Mine

while true do
    function dig()

        turtle.dig()
        turtle.forward()
        turtle.digUp()
        t + 1
            if t == 5 then
                turtle.palce()
                t = 0
            end
    end

    function strip()
        for i = 1,20 do
            dig()
        end
    end

    function inv()
        if turtle.getItemCount(16) > 0 then
            break
        end
    end

    t = 0

    strip()

    inv()

    turtle.turnRight()

    for i = 1,3 do
        dig()
    end
    turtle.turnRight()

    strip()

    inv()

    turtle.turnLeft()

    for i = 1,3 do
        dig()
    end

    turtle.turnLeft()
end