count = 2
goforward = true
turtle.forward()
turtle.placeDown()
count = count + 1
while goforward == true do
    turtle.dig()
    turtle.forward()
    if turtle.detectDown() == false then
        count = count + 1
    else
        goforward = false
    end
    turtle.placeDown()
end
turtle.turnRight()
turtle.forward()
turtle.turnRight()
for i=1, count do
    turtle.placeDown()
    turtle.forward()
end