hi,

if u know, help me to calculate/count cycles by looking at C program.

Unfortunatelly you have not specified OSC frequency. Moreover, you have not indicated how Delay() is long.
You may calculate the time yourself. Run Debuger and set breakpoints. Execute the function and see how much states it takes. If you set correct Xtal frequency (menu "Options for Target..." then you will give the time in seconds as well.
By the way, I could suggest you to use a timer for refresh task. It helps to avoid many problems including jitter effect during the scroll.

Regards,
Oleg