Pink Xmas is a child theme for Twenty Twelve with Christmas/holiday accent. It comes with a snow falling effect. You may download it. It may also be used on wordpress.com if you have custom CSS purchased.
To use this style on wordpress.com with custom css:
- Activate the Twenty Twelve theme
- Use the following custom css
Copy everything after:
/* ========================================================================= * Pink Xmas * ========================================================================= */ /* customized by pure-essence.net */
here.
Replace all image URLs
url(images/
with
url(//regretless.com/oriental/wp-content/themes/pinkXmas/images/
Pure-Essence.Net 
Hi! Great theme!! I was wondering how I might substitute my own images to replace the snow that’s falling? So I could have little ribbons falling or something else? Thank you!
the currently snow fall script i use doesn’t support it but i might switch to something like http://www.jqueryrain.com/?GKBtfF4Q that allows you to define the image.