Kala Sha Kalaa [1991] _ Aayee Milan Ki Raat _ Avinash Wadhawan, Shaheen

A Tantrik converts two lovers into a snake, one at sunset and one at sunrise.
http://www.imdb.com/title/tt0404797/
http://astrobix.com/festivals_of_india/nag_panchami/
Nag Panchami Festival 2012, 23 July
The majority population of India, even today is dependent on agriculture as their profession. Here, tradition of worshiping trees and plants, has been carried on since ancient times. This is the reason that today, in every house Tulsi plant is being worshipped. Festival like 'Vanotsav'(environment day) are an identity of our culture.

Worship of Agricultural Tools on Nag Panchami
In our country, special importance is given to all goods and objects related to livelihood. Additionally, being a rich in cultivation, all the goods used for saving agricultural lands and all items used for farming, are worshiped here.As per the mythological tale, Lord Krishna said that instead of worshiping Indra or any other good, cow, bulls and other items used for farming should be worshipped.