dispatchTop

rednet.open("left")
while true do
  local event, id, message = os.pullEvent()
  if (event == "rednet_message" and message == "dispatchTop") then
    rs.setOutput("back", true)
    os.sleep(5)
    rs.setOutput("back", false)
  end
  if event == "redstone" then
    rednet.broadcast("dispatchBottom")
  end
end