I'm not sure how I'd go about doing it if I only wanted the lights to each blink once..
Put the code in setup() and it will only run once or put it in a function and call that function only when a trigger event occurs.
Shorten the code drastically by putting the pin numbers in an array and iterating through it with a for loop.
Having said that, your major mistake is that the rgbLight() function calls itself recursively. Do not do this unless you know exactly what you are doing.
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