<script language="JavaScript1.2">
function tremer(n) {
if (self.moveBy) {
for (i = 10; i > 0; i--) {
for (j = n; j > 0; j--) {
self.moveBy(0,i);
self.moveBy(i,0);
self.moveBy(0,-i);
self.moveBy(-i,0);
}}}}
tremer(5) 
</script>
</BODY>