html:after {
content: "";
background-image: 
    url(../img/img01.jpg),
    url(../img/img_magazine.png),
    url(../img/btn_close.png),
    url(../img/btn_more.png),
    url(../img/q01_c.png),
    url(../img/q01_o.png),
    url(../img/q02_c.png),
    url(../img/q02_o.png),
    url(../img/q03_c.png),
    url(../img/q03_o.png),
    url(../img/q04_c.png),
    url(../img/q04_o.png),
    url(../img/q05_c.png),
    url(../img/q05_o.png),
    url(../img/q06_c.png),
    url(../img/q06_o.png),
    url(../img/q07_c.png),
    url(../img/q07_o.png),
    url(../img/q08_c.png),
    url(../img/q08_o.png)
    
}