Microcontroller programming

I went ahead and did my first micro controller program for the Arduino - a simple 'hello world' program that flashes a led at a set internval. Very easy. So I took the plunge and hooked it up to control a servo based on a potentiometer setting. This is similar to what I want to do with my automatic servo control of the camera in the high alt ballon. Very cool...of course these are both step by step examples found on the web - next step is to create my own program to sweep the servo to set positions at set times...