Arkaplan resmini değiştirme(yardım)

<script> /*Random background color- by javascriptkit.com*/ //Enter list of bgcolors: / arkaplan renklerini buradan değiştireceksiniz var bgcolorlist=new Array("#DFDFFF", "#FFFFBF", "#80FF80", "#EAEAFF", "#C9FFA8", "#F7F7F7", "#FFFFFF", "#DDDD00") document.bgColor=bgcolorlist[Math.floor(Math.random()*bgcolorlist.length)] </script>

body{background-image:url(RESMİN URLSİ BURAYA);background-attachment: fixed}