Custom WS2812 coding

Other Hardware LEDs and Multiplexing
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Hi guys. So I have a project I wish to achieve with some ws2812 leds and the rear lights on my car. I have a 2007 ford c-max which, without tooting my own trumpit, has some pretty stylish rear lights with the taillight being a strip of led's down the centre of each light. What I'd like to achieve with some ws2812's is when i turn the lights on, id like to make them turn on/off in a fancy manor. For example, starting from the centre fading up/down, or even starting at the bottom and each led turning on in turn until it reaches the top - sort of thing.

I've attached a photo of my type of rear lights so you know exactly what im dealing with, but the coding is where im struggling. I have an arduino nano ive been playing with using fastled and a strip of 30 ws2812's, but writing my own code I just dont know where to start. I've tried various library examples from fastled library, and playing with the code, but i just end up messing the code up and it doesnt do anything.

Any advice is of course welcome!

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I've tried various library examples from fastled library, and playing with the code, but i just end up messing the code up and it doesnt do anything.

Ok that is a good way to start. Keep trying this approach.

Try and understand what the code is doing, read it like a book. If you don’t understand any specific instruction look it up in the reference.

Try and make the changes smaller so you stand less of a chance of stopping things working.

Also go through the examples in the IDE auto get an idea of the language.

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