[NTG-context] ConTeXt sample sourse code

Dear ConTeXt users, I am a beginner of this amazing software. I am just wondering if any one can offer me a simple example for setting up slides format, so that I can play around with it and get better sense of what it can do. It is best if the example can have interaction features and some backgrounds choices. What I have is the windows XP distribution, Miktex, Winedt. Any other suggestions about how to create a slide show would be greatful. I really appreciate your kind help. Wei