What is the best best approach for dynamically setting the blink frequency of a multi-led arduino driven strob light?

I am building a multi-light strobe. I need to drive each of the LED's separately and want to be able to dynamically change the frequency (flash rate) of each individual light on the fly. For example, I'd like to be able to send a command to the device from my laptop to change the frequencies. This will ultimately enable me to store pre-designed sequences that could be fed into the LED strobe system. I have code to drive the individual lights now (http://123d.circuits.io/circuits/138205-multi-led-strobe/) and am curious on the approach I should take. Any help or resources is much appreciated!