local LoadedSounds
if CLIENT then
    LoadedSounds = {} -- this table caches existing CSoundPatches
end

local function ReadSound( FileName )
    local sound
    local filter
    if SERVER then
        filter = RecipientFilter()
        filter:AddAllPlayers()
    end
    if SERVER or !LoadedSounds[FileName] then
        -- The sound is always re-created serverside because of the RecipientFilter.
        sound = CreateSound( game.GetWorld(), FileName, filter ) -- create the new sound, parented to the worldspawn ( which always exists )
        if sound then
            sound:SetSoundLevel( 0 ) -- play everywhere
            if CLIENT then
                LoadedSounds[FileName] = { sound, filter } -- cache the CSoundPatch
            end
        end
    else
        sound = LoadedSounds[FileName][1]
        filter = LoadedSounds[FileName][2]
    end
    if sound then
        if CLIENT then
            sound:Stop() -- it won't play again otherwise
        end
        sound:Play()
    end
    return sound -- useful if you want to stop the sound yourself
end

-- When we are ready, we play the sound:
timer.Simple( 0, function() PrintMessage( HUD_PRINTCENTER,"Attention Server Restart In 30 Seconds" ) end )
timer.Simple( 3, function() PrintMessage( HUD_PRINTCENTER,"Attention Server Restart In 30 Seconds" ) end )
timer.Simple( 6, function() PrintMessage( HUD_PRINTCENTER,"Attention Server Restart In 30 Seconds" ) end )
timer.Simple( 9, function() PrintMessage( HUD_PRINTCENTER,"Attention Server Restart In 30 Seconds" ) end )
timer.Simple( 12, function() PrintMessage( HUD_PRINTCENTER,"Attention Server Restart In 30 Seconds" ) end )
timer.Simple( 15, function() PrintMessage( HUD_PRINTCENTER,"Attention Server Restart In 30 Seconds" ) end )
timer.Simple( 18, function() PrintMessage( HUD_PRINTCENTER,"Attention Server Restart In 30 Seconds" ) end )
timer.Simple( 24, function() PrintMessage( HUD_PRINTCENTER,"Attention Server Restart In 30 Seconds" ) end )
timer.Simple( 27, function() PrintMessage( HUD_PRINTCENTER,"Attention Server Restart In 30 Seconds" ) end )
timer.Simple( 30, function() PrintMessage( HUD_PRINTCENTER,"Attention Server Restart In 30 Seconds" ) end )
timer.Simple( 33, function() PrintMessage( HUD_PRINTCENTER,"Attention Server Restart In 30 Seconds" ) end )
timer.Simple( 36, function() PrintMessage( HUD_PRINTCENTER,"Attention Server Restart In In 30 Seconds" ) end )

ReadSound( "ambient/alarms/alarm_citizen_loop1.wav" )