<!DOCTYPE HTML>
<html>
<body>
<script>
function op() { setTimeout("op9",5000); }
function op9() { document.body.style.backgroundColor='White' setTimeout("op8()",speed); }
function op8() { document.body.style.backgroundColor='Honeydew' setTimeout("op7()",speed); }
function op7() { document.body.style.backgroundColor='Azure' setTimeout("op6()",speed); }
function op6() { document.body.style.backgroundColor='Seashell' setTimeout("op6()",speed); }
function op5() { document.body.style.backgroundColor='OldLace' setTimeout("op4()",speed); }
function op4() { document.body.style.backgroundColor='LavenderBlush' setTimeout("op()",speed); }
</script>
</body>
</html>
так???