Hi.

I m not sure what you meant by HTML of Animated Flag..But If you are looking for animated Nepali flag then you can search on google. 

Some of them are as follows :-

http://www.3dflags.com/world/nepalese/national_flag/classic_waving_clip_art.html

http://www.national-flags.com/flags/Nepal_Flag.html

http://www.virtuallandmedia.com/flags3-2/asia/nep.gif

http://www.flagfactory.co.za/flags_of_the_world.html

Non-Animated

http://www.flags-and-anthems.com/flag-graphics-nepal.html