Inventory Manager (Receiver)

--[[
Inventory Manager (Receiver)
Written by TheShadow989
]]--

--[[
Modem Channels (Inverse of Sender)

senderChannel = Unique channel number used for modem communication.
replyChannel = Unique channel for this computer to reply back.

]]--

local senderChannel = 1
local replyChannel = 2

-- Working Variables (DO NOT CHANGE)
local sides = {"top", "bottom", "left", "right", "front", "back"}
local modem = "" -- Modem

--Find Modem Side
for i=1, #sides do
    if peripheral.isPresent(sides[i]) then
        if peripheral.getType(sides[i]) == "modem" then
            modem = sides[i]
        end
    end
end

-- Sender Channel
modem.open(senderChannel)

--------------------------------------------------------------------------
--  PROGRAM LOOP
--------------------------------------------------------------------------
while true do
    local e = {os.pullEvent()}

    if e[1] == "modem_message" and e[3] == senderChannel then
        local message
        local index = 1

        for str in string.gmatch(e[5], "[^;]+") do
            message[index] = str
            index = index + 1
        end

        if message[1] == "Mob" then
            if message[2] == "ON" then
                redstone.setBundledOutput("back", colors.combine(redstone.getBundledOutput("back"), colors.red))
            else
                redstone.setBundledOutput("back", colors.subtract(redstone.getBundledOutput("back"), colors.red))
            end
        elseif message[1] == "Mining" then
            if message[2] == "ON" then
                redstone.setBundledOutput("back", colors.combine(redstone.getBundledOutput("back"), colors.blue))
            else
                redstone.setBundledOutput("back", colors.subtract(redstone.getBundledOutput("back"), colors.blue))
            end
        elseif message[1] == "Option3" then
            if message[2] == "ON" then
                redstone.setBundledOutput("back", colors.combine(redstone.getBundledOutput("back"), colors.yellow))
            else
                redstone.setBundledOutput("back", colors.subtract(redstone.getBundledOutput("back"), colors.yellow))
            end
        elseif message[1] == "Option4" then
            if message[2] == "ON" then
                redstone.setBundledOutput("back", colors.combine(redstone.getBundledOutput("back"), colors.orange))
            else
                redstone.setBundledOutput("back", colors.subtract(redstone.getBundledOutput("back"), colors.orange))
            end
        elseif message[1] == "Option5" then
            if message[2] == "ON" then
                redstone.setBundledOutput("back", colors.combine(redstone.getBundledOutput("back"), colors.green))
            else
                redstone.setBundledOutput("back", colors.subtract(redstone.getBundledOutput("back"), colors.green))
            end
        end

        modem.transmit(replyChannel, senderChannel, message[1] + ";" + message[2])
    end
end