Intro To Digital Timers:

Data & Observations
           The software output is very unimpressive because things are happening far too fast. For this reason a video wasn't made. But if you program the PIC and wire it up you should see something similar to this:

           The first two LEDs will always be on. The timer (2 & 3) count & switch the LED voltage too fast for the human eye to see. The LEDs controlled by timers 0 & 1 however can be seen blinking fairly fast. Again this is because 1 instruction cycle on the PIC with a 20 MHz clock input takes 1/5,000,000 seconds. Even with a 16-bit wide register 65536*(1/5,000,000) is only 13mS which is so barely noticeable to the naked eye.