function move() {
var leaf = document.getElementById('leaf').style;
if (parseInt(leaf.left) > -30) {
leaf.top = parseInt(leaf.top) + 14 - Math.random()*5 + 'px';
leaf.left = parseInt(leaf.left) - 9 - Math.random()*10 + 'px';
setTimeout("move()", 120);
}
else {
leaf.left=500;
leaf.top=225;
setTimeout("move()", 30000);
}
}