toggleBundleColor

local validSides = {top = true, bottom = true, left = true, right = true, front = true, back = true}
local validPow2 = {[1] = true, [2] = true, [4] = true, [8] = true, [16] = true, [32] = true, [64] = true, [128] = true,
            [256] = true, [512] = true, [1024] = true, [2048] = true,
            [4096] = true, [8192] = true, [16384] = true, [32768] = true }


function toggleBundleColor(sSide, ...)
    -- Provide helpful error messages
    if type(sSide) ~= "string" then
        error("(toggleBundleColor): Bad argument (sSide, 1): Expected string, got " .. type(sSide), 2)
    end
    if not validSides[sSide] then
        error("(toggleBundleColor): Unrecognied side: " .. sSide, 2)
    end
    -- Retrieve the colors outside of the loop
    local nColors = rs.getBundledOutput(sSide)

    -- Loop through all the extra arguments
    for i, v in ipairs(arg) do
        -- Error messages, again.
        local sColor = v
        local nColor = colors[sColor]
        if type(sColor) == "number" then
            nColor = sColor
        end
        if not validPow2[nColor] then
            error("(toggleBundleColor): Bad argument (color, " .. i .. "): Unrecognized color.", 2)
        end
        -- Modify the color
        nColors = bit.bxor(nColors, nColor) -- This will toggle the 'bit' of color we have.
    end

    rs.setBundledOutput(sSide, nColors) -- Change the colors.
    return nColors -- Return what the changed colors are.
end