```<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
var num=1;
for (num=1;num<=6;num++){
console.log('這是去除的第'+num+'個球</br>')
}
</script>
</body>
</html>