开始时关闭

$(function(){
    $('#blindify').blindify({
        startClosed: true,
        firstOpenDelay: 1000,
        numberOfBlinds: 15,
        width: 900,
        height: 500
    });
});

<div id="blindify">
    <ul>
        <li><img src="images/photo_1.jpg" alt=""></li>
        <li><img src="images/photo_2.jpg" alt=""></li>
        <li><img src="images/photo_3.jpg" alt=""></li>
        <li><img src="images/photo_4.jpg" alt=""></li>
    </ul>
</div>