“C” language Programme Question urgently required

Respected Sir,
My name is Mohsin.

Question;
Write a TSR program that will act like a simple screen saver. Once invoked after 10 seconds of the invocation of your program, it will display your name; name will remained on screen until the ?B? key is pressed. Once the ?B? is pressed the previous screen will restored.

Hint:

Use Timer interrupt (0x08H)
Intercept Keyboard interrupt (0x09H)
Use video text memory address 0xB000000H

Note: submit .C files only.