I need to write a code .. please any one can help.
Thank you, Thank you, in this sea fo GIMME GODE!! it is refreshing to see a post as yours.

clock ... using one of its timers in counter mode
That one I have never heard of.

There are two basic approaces to '51 clocks
a) use a timer as a timer. Then you will lose time every time the power is interrupted.
b)use a RTC chip. Thse chips have battery backup and will keep the time even when the power is off.

If this is your first project, first download "the bible" chapters 1, 2 and 3 (addresses in links <---), then have a look at the tutorials <---. When you have grasped the basics and gotten started come back with your specific problems.

Erik