digslave

repeat
  if redstone.getInput("top")then
    turtle.dig()
    turtle.suck()
    -- check slot 2 of turtle
    -- if an item is in it then
    -- overflow has occurred
    -- trigger the turtle to take
    -- a dump er leave one.
    if turtle.getItemCount(2)>0 then
      while true do
        for slot=1,16 do
          turtle.select(slot)
          turtle.dropDown()
        end
      end
    end
  else
    break
  end
until x == 1