Computercraft - Airlock Controller Program

--[[
Galacticraft Airlock Controller Program V1
This program is designed for use in Tekkit (Galacticraft, MineFactory Reloaded*, & Computercraft mods required)

*or any mod that uses colored channels for redstone wiring (e.g. bundled cables from "ProjectRed - Transmission")

Wiring Guide:
Outputs:
    White Channel: Inner Air Lock (set controller to open on redstone signal)
    Orange Channel: Outer Air Lock (set controller to open on redstone signal)
    Light Blue Channel: Piston (to shut off/on the oxygen sealer - I placed this below the airlock and used iron bars as a vent
Inputs:
    Magenta: Button (to cycle airlock)

Important: Please create a program called .config on the computer. Put anything into line 1 of it and save it. This will serve as a storage of the air lock's state. This will get overwritten as the air lock cycles. It defaults to an oxygen sealed state (inner air lock opened, outer air lock sealed)
]]--

-- Variables
status = "Compressed"
test = false
-- Initial Check
if not fs.exists(".config") then
    status = "unsafe"
else
    data = fs.open(".config", "r")
    status = data.readLine()
    data.close()
    rs.setBundledOutput("back", colors.combine(colors.white, colors.orange, colors.lightBlue))
end

while true do
    data = fs.open(".config", "r")
    status = data.readLine()
    data.close()
    -- Stops the program if the airlock config file doesn't exist
    if status == "unsafe" then
        break
    end
    if status == "Decompressed" then
        rs.setBundledOutput("back", colors.combine(colors.white, colors.orange, colors.lightBlue))
        rs.setOutput("left", true)
        rs.setOutput("right", true)
        sleep(2)
        rs.setBundledOutput("back", colors.combine(colors.white, colors.orange))
        sleep(2)
        rs.setBundledOutput("back", colors.orange)
        data = fs.open(".config", "w")
        data.writeLine("Compressed")
        data.close()
        rs.setOutput("left", false)
        rs.setOutput("right", false)
    else
        rs.setBundledOutput("back", colors.combine(colors.white,colors.orange))
        rs.setOutput("left", true)
        rs.setOutput("right", true)
        sleep(2)
        rs.setBundledOutput("back", colors.combine(colors.white, colors.orange, colors.lightBlue))
        sleep(2)
        rs.setBundledOutput("back", colors.combine(colors.white, colors.lightBlue))
        data = fs.open(".config", "w")
        data.writeLine("Decompressed")
        data.close()
        rs.setOutput("left", false)
        rs.setOutput("right", false)
    end
    while rs.testBundledInput("back", colors.magenta) == false do
        sleep(0.1)
    end
end