Image Gallery - Add, Select & Delete Thumbnail

HTML

<button>ADD MORE</button>

<ul>
    <li style="background-image: url(http://lorempixel.com/100/100/);" class="aimg"><span>SELECT</span><span>DELETE</span></li>
    <li style="background-image: url(http://lorempixel.com/100/100/);" class="aimg"><span>SELECT</span><span>DELETE</span></li>
    <li style="background-image: url(http://lorempixel.com/100/100/);" class="aimg"><span>SELECT</span><span>DELETE</span></li>
    <li style="background-image: url(http://lorempixel.com/100/100/);" class="aimg"><span>SELECT</span><span>DELETE</span></li>
</ul>

CSS

* { 
    font-family: arial; box-sizing: border-box; 
    -moz-box-sizing: border-box; 
}
ul { list-style-type: none; margin: 0px; padding: 0px; }
ul li { 
    padding-top: 35px;
    float: left; width: 110px; height: 110px;
    background-position: center center;
    background-repeat: no-repeat; border: 1px solid #ccc;
    background-color: #f0f0f0;
    margin: 0 10px 10px 0;
}
ul li span { 
    display: none; background-color: rgba(0,0,0,0.5); 
    color: #555; text-align: center; 
    margin: 0px 15px 10px 15px; color: #fff; 
    border-radius: 5px;
    padding: 3px; cursor: pointer;
}
ul li:hover span { display: block; }
ul li:hover span:hover { background-color: rgba(0,0,0,1); }

ul li.selected { border: 2px solid #000; }

JavaScript

$('ul').on('click','li span:first-child', 
    function(){ 
        if($(this).parent().hasClass('selected')) { 
            $(this).parent().removeClass('selected'); 
        }
        else { $(this).parent().addClass('selected'); } 
    }
);

$('ul').on('click','li span:nth-child(2)', 
    function(){ 
        $(this).parent().fadeOut(300, function(){ 
            $(this).remove(); 
        }); 
    }
);

$('button').click(function(){
    $('<li style="background-image: url(http://lorempixel.com/100/100/)" class="aimg"><span>SELECT</span><span>DELETE</span></li>').hide().appendTo('ul').fadeIn(300);
});