Now you can run the Raspberry Pi. Connect by Terminal if you use MAC OSX or Linux. If you use a Windows system, you can download putty (www.putty.org). Connect by a ssh protocol, and use the terminal for write the Python program and for command the RGB led light.
An important feature of Raspberry Pi is the presence of Python. Now Raspbian have inside a version of Python. You can test the presence of Python in your Raspbian system by this command:
When you write this command if the system have installed Python write on the screen the Python version.