startup.lua

turtle.select(1)

while true do

 for y = 1, 3, 1 do

  for x = 1, 3, 1 do

   turtle.select(4*(y-1) + x)

   while turtle.getItemSpace() > 0 do

    turtle.suck(turtle.getItemSpace())
   end
  end
 end

 turtle.craft()
 turtle.dropUp()

end