Multiplexing 4-digit seven segment display using PIC16F877a

I'm making a project and I choose multiplexing 4 seven segment displays with my PIC16F877a.

Here's how it goes: the first two seven segments will display the "Minutes" and the last two seven segments will display "Seconds".

**broken link removed**

Please help me with the source code since I'm having difficulty with that. Thanks in advance..!

You can check my tutorials for doing two - easily converted for more.

or you can use either a MAX7221 or AS1107. This will do it for you and save you some port pins and you can control the brightness etc too