c program for PIC16F777 to glow leds

my project is to glow 8X8 leds using PIC microcontroller 16F777. i have to write code in c language. currently i want the following things to be done. 1.? I want to see the timer up and running.? You should be able to show mecontrol of the frequency and duty cycle to provide differing brightness foran LED. 2.? Get an analog to digital input working using thepotentiometer on the development board.? Use the input voltage level to setthe characteristics of the timer.? In other words, as you change thelevel of the potentiometer, you should automatically see the LED blinkat different rates. 3.? Get an interrupt working demonstrating controlof a second LED.