Strip-Mine v2

local args = {...}
length = args[1]

function dig()
        while turtle.detect() do
            turtle.dig()
            os.sleep(0.5)
        end
end
function digUp()
        while turtle.detectUp() do
            turtle.digUp()
            os.sleep(0.5)
        end
end
function forward()
    while turtle.forward()==false do
        os.sleep(1)
        dig()
    end
end
function clear()
    dig()
    forward()
    digUp()
    turtle.digDown()
end
-------------
digUp()
turtle.digDown()
for x=1,length,1 do
    for i=1,2,1 do
        clear()
    end
    turtle.turnRight()
    for i=1,5,1 do
        clear()
    end
    turtle.turnRight()
    turtle.turnRight()
    for i=1,5,1 do
        forward()
    end
    for i=1,5,1 do
        clear()
    end
    turtle.turnRight()
    turtle.turnRight()
    for i=1,5,1 do
        forward()
    end
    turtle.turnRight()
    forward()
    forward()
    forward()
    turtle.select(1)
    turtle.placeDown()
    turtle.turnRight()
    turtle.turnRight()
    forward()
    forward()
    forward()
    clear()
end