<scrīpt language="Javascrīpt" type="text/Javascrīpt">
function sh()
{ww=parseInt(document.body.offsetWidth)
wh=parseInt(document.body.offsetHeight)
cw=parseInt(wh*Math.random()/2)
nleft=parseInt((ww-cw)*Math.random())
ntop=parseInt((wh-cw)*Math.random())
c1.style.left=nleft
c1.style.top=ntop
c1.style.fontSize=cw
tmp=""
for (i=0;i<6;i++)
 { n=parseInt(16*Math.random())
   tmp+=n.toString(16)
 }
 c1.style.color=tmp
}
function sg()
{setInterval("sh()",200)}

</scrīpt>
<div id="c1" style="position:absolute; left: 127px; top: 54px;" ōnclick="sg()">●</div>