i=55
j=0
function inv()
    a = 1
        for a=1,9 do
        turtle.getItemCount(a)
        a = a+1
        if turtle.getItemCount(a) >= 1 then
            return true
        else
            return false
        end
    end
end
while i > 0 do
    turtle.digDown()
    turtle.dig()
    turtle.turnLeft()
    turtle.dig()
    turtle.turnRight()
    turtle.dig()
    turtle.turnRight()
    turtle.forward()
    turtle.turnLeft()
    turtle.turnLeft()
    i = i-1
end
while i == 0 do
    turtle.turnLeft()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.turnRight()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.turnLeft()
    turtle.forward()
    turtle.turnRight()
    j = j+1
    if inv() == true then
        turtle.back(j)
        turtle.up(55)
        sleep(180)
        turtle.down(55)
        turtle.forward(j)
    end
end