StorageSys reciever

hostID =1
if not rednet.isOpen("front") then
     rednet.open("front")
end

while true do
     local e = { os.pullEvent() }
     if e[1] == "rednet_message" then
          if e[2] == hostID then
               if e[3] then
                    if e[3] == "on" then
                         rs.setOutput("back",true)
                    elseif e[3] == "off" then
                         rs.setOutput("back",false)
                    end
               end
          end
     end
end