Based on the advice I've done a little research and found a section of code for both the Arduino and the python script which sends a value to the Arduino via serial and get a LED to flash x amount of times. I'm pretty sure I can based my script around this.
Few questions if I can
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Is there a maximum number of LEDs any given Arduino can support? (part of my project is a circular set of 8 LEDs which will flash in a pattern to create a circular rotating light) Ideally to keep options open I could do with allowing 12 LED's to be individually controlled.
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When doing a little research I came across a comment suggesting that you can bridge something on the arduino unit to disable to unit from resetting on serial connection? Is this true? Would there be any real advantage in this? realistically what kind of time does the unit take to reinitialise to accept another instruction via serial?
Any advice on which unit is maybe most suitable or one to avoid? Ideally I'm looking for minimal cost that will get the job done 