Hello Kashyap Deepak,
Take a look at this web site. It tells how to do the
project you are currently trying to do.
http://www.nd.edu/~isall/Co...0level.pdf
Hopefully after you read the above you will scrape the LM555 IC.
Get the book I mentioned and it will explain how
to set up your 89C2051.
Good Luck,
Charles Bannister