Turtle Pulse Per Item Count

while true do

function pulse(num)
  for i = 1,num do
  shell.run("redpulse", "back", "1", "1.5")
  end
end

function run()
  if turtle.getItemCount(1) < 1 then
    sleep(2.5)
    else
      pulse(turtle.getItemCount(1)-0)
      turtle.dropDown()
    end
  end
sleep(2.5)
run()
end