Just for fun, clear the URL in the address bar before copying the javascript line below and pasting it into the address bar, then pressing Enter:
<font size="1">javascript:R=0; x1=.1; y1=.05; x2=.25; y2=.24; x3=1.6; y3=.24; x4=300;y4=200; x5=300; y5=200; DI=document.getElementsByTagName("img");DIL=DI.length; function A(){for(i=0; i-DIL; i++){DIS=DI[ i ].style;DIS.position='absolute'; DIS.left=(Math.sin(R*x1+i*x2+x3)*x4+x5)+"px";DIS.top=(Math.cos(R*y1+i*y2+y3)*y4+y5)+"px"}R++}setInterval('A()',50);void(0);</font>

NOTE: Press F5 to stop the chase.