LED stripe - moving light

Hi folks,

I'm totally new to this and probably what you would call a newbie or greenhorn.
However, to get to know arduino and the way of programming, I learn the best if I actually use it for a project that I want to complete.

Is therefore someone able to point me to the correct tutorial for this?
I want to create a moving light with an LED strip outside our house, which will be a guiding light to the main door. Basically once a PIR sensor is triggered on one side, the leds should go on one by one. The same the other way around (when you leave the house).
I've seen similar tutorials and I think this won't be rocket science, but it would be great if someone can point me into the right direction...so I can see if this actually does work and I'm not going down the wrong road.

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Please do not cross post. Question also here.