Orkade inte få ner den mer än till 400 bytes

gistfile1.js

var d=document,b=d.body,R=Math.random;b.style.background="#001",b.style.color="#F31",b.innerHTML="God Jul, Kodapor!",c=300;while(c--)(function(){var e=b.appendChild(d.createElement("b")),t=e.style,n=0,r=R(),i=R()*1500,s=R()*800,o=3+2*R();e.innerHTML="*",t.position="absolute",t.color="#fff",t.opacity=R(),setInterval(function(){t.top=(s+=o)%800+"px",t.left=i+90*Math.sin(n+=r/50)+"px"},20)})();