Example JS script for flashing cities on a map

var INTERVAL = 1;
var ORDER = 'random'; /* Otherwise - direct */

var points = Object.keys(map.mapConfig.points);

var canShow = true;
var currentI = null;
var enTimer = false;

var hidePoints = function () {
    for (var i = 0; i < points.length; i++) {
        if (i !== currentI)
            map.hideState(points[i]);
    }
};

var showPoints = function () {
    for (var i = 0; i < points.length; i++) {
        if (i !== currentI)
            map.showState(points[i]);
    }
};

var showNextPoint = function () {
    var curPid;
    if ( ! canShow)
        return;
    if (currentI === null) {
        currentI = ORDER === 'random' ? Math.floor(Math.random()*1000) % points.length : 0;
    } else {
        hideCurrentPoint();
        if (ORDER === 'random') {
            do {
                var cI = Math.floor(Math.random()*1123) % points.length;
            } while (cI === currentI);
            currentI = cI;
        } else {
            currentI = currentI == points.length - 1 ? 0 : currentI + 1;
        }
    }
    showCurrentPoint();
};

var showCurrentPoint = function () {
    if (currentI === null)
        return;
    var curPid;
    curPid = points[currentI];
    map.showState(curPid);
    map.stateHighlightIn(curPid);
};

var hideCurrentPoint = function (onlyTt) {
    if (currentI === null)
        return;
    var curPid;
    curPid = points[currentI];
    map.stateHighlightOut(curPid);
    if (onlyTt) return;
    map.hideState(curPid);
};

hidePoints();

setInterval(showNextPoint, INTERVAL * 1000);
showNextPoint();

jQuery('#'+containerId).on('mouseenter', function (ev) {
    if (enTimer) {
        clearTimeout(enTimer);
        enTimer = false;
    }
    hideCurrentPoint(true);
    showPoints();
    canShow = false;
});

jQuery('#'+containerId).on('mouseleave', function (ev) {
    if (enTimer) {
        clearTimeout(enTimer);
        enTimer = false;
    }
    enTimer = setTimeout(function () {
        canShow = true;
        hidePoints();
        showCurrentPoint();
    }, 300);
});