Help Needed!

Hello,
I'm a graduate student new to psychtoolbox and I am trying to get familiar with it.
The aim of using this toolbox is writing a program in which the observer would be able to look at colorful dots which are changing their color rapidly and being able to adjust the speed parameter or other parameters regarding his/her perception.
Can you please let me know where can I start?
I've looked at help and demos but I think if I had a couple of examples in hand it would be much easier for me to
learn how to work with it.


Thanks for your time and help,

Sahar