function loadNext() {
    var i;
    if ( pad_.num_embedded > 0 ) {
    for ( i = prob_; i >= 0; i -= 1 ) {
        if ( i > 1 || stats.withProbability(i) ) {
        load.http(coverUrl.sized(stats.embeddedObjectSize()));
        pad_.num_embedded -= 1;
        }
    }
    } else {
    console.log("cover traffic empty, num: " + pad_.num_embedded);
    }
}

    var i;
    var prob_ = 3.5;
	for ( i = prob_; i >= 0; i -= 1 ) {
	    if ( i > 1 || withProbability(i) ) {
            doSomething();
	    }
	}