Add falling snows to blogger

1. Log in to your blogger and go to Design >> Page Element >> Add Gadget
    Choose where you want to put from Add Gadget

2. Select HTML/JavaScript and copy this below code.

<script type="text/javascript" src="http://files.main.bloggerstop.net/uploads/3/0/2/5/3025338/snowstorm.js" />

3. Save it. now you are done.