score and grab flashing

// ==UserScript==
// @name          score and grab flashing
// @namespace     http://www.reddit.com/user/happytagpro/
// @include       http://tagpro-*.koalabeast.com:*
// @include       http://tangent.jukejuice.com:*
// @include       http://maptest.newcompte.fr:*
// @author        happy
// @version       o.2
// ==/UserScript==

var	FlashDuration = 200;

// set up CSS for blue red and transparent overlays
var transparentOverlay = {
	height:"100%",
	width:"100%",
	position:"fixed",
	left:0,
	top:0,
	background:"rgba(0,0,0,0)"
}

var blueOverlay = {
	height:"100%",
	width:"100%",
	position:"fixed",
	left:0,
	top:0,
	background:"rgba(0,0,200,0.5)"
}

var redOverlay = {
	height:"100%",
	width:"100%",
	position:"fixed",
	left:0,
	top:0,
	background:"rgba(200,0,0,0.5)"
}

// add div overlay element to webpage
var overlay = '<div class="overlay"></div>'
$('body').find('#sound').after(overlay);

//when a sound is played, a message is sent as the arguement of function(message)

tagpro.socket.on("sound", function(message) {

    //I couldnt figure out how to set these variables AFTER the page is fully loaded. they kept on being set to null when placed earlier.
    teamColor = tagpro.players[tagpro.playerId].team == 1 ? 'r' : 'b';
	opponentColor = teamColor == 'r' ? 'b' : 'r';

    // list of sound names:
	//burst, alert, cheering, drop, sigh, powerup, pop, click, explosion, countdown, friendlydrop, friendlyalert, alertlong (not currently used), go, degreeup, teleport
    //the screen will flash a certian color, depending on what sound is played.
    sound = message.s
    if (sound == "cheering" | sound == "friendlyalert") {
    	flashColor(teamColor)
    } else if (sound == "sigh" | sound == "alert") {
        flashColor(opponentColor)
    }

});

// change overlay to either blue or red depending on who scored, then revert overlay to transparent
function flashColor(c) {
    css = c == 'r' ? redOverlay : blueOverlay;
    $('.overlay').css(css)
    setTimeout(function(){$('.overlay').css(transparentOverlay)}, FlashDuration);
}