Changing the background of .html

if you have a white .swf background, then your .html will be all white. etc. how do i make the .swf grey or something and make the .html a pattern? suchas a this site…

heres my source…
<meta http-equiv=Content-Type content=“text/html; charset=utf-8”>
<BODY bgcolor="#FFFFFF">
<!-- URL’s used in the movie–>
<!-- text used in the movie–>
<OBJECT classid=“clsid:D27CDB6E-AE6D-11cf-96B8-444553540000”
WIDTH=“750” HEIGHT=“400” id=“PixelExplosion” ALIGN=“top”>
<PARAM NAME=movie VALUE=“PixelExplosion.swf”> <PARAM NAME=quality VALUE=best> <PARAM NAME=scale VALUE=exactfit> <PARAM NAME=wmode VALUE=transparent> <PARAM NAME=devicefont VALUE=true> <PARAM NAME=bgcolor VALUE=#033366> <EMBED src=“PixelExplosion.swf” quality=best scale=exactfit wmode=transparent devicefont=true bgcolor=#003366 WIDTH=“750” HEIGHT=“400” NAME=“PixelExplosion” ALIGN=“top”
TYPE=“application/x-shockwave-flash” PLUGINSPAGE=“”></EMBED>
<style type=“text/css” media=“screen”>
@import “/pattern3.css”;