blink()

Are there details on how to use blink ?

it turns orange when I try to write it in the IDE.

That's because it's defined in the keyword file of the (default) LiquidCrystal library.

is there a complete list of all keywords ?

also, since it is such a generic term, it is a shame that it is taken for such a small use.
I can see that it is probably so embedded, it is there to stay.

it is there to stay.

Unless you remove all the keywords.txt files that contain it, or update the IDE so that only entries in keywords.txt files of libraries #included in the program were noted and highlighted, but that is not likely to happen.

UKHeliBob:
Unless you remove all the keywords.txt files that contain it, or update the IDE so that only entries in keywords.txt files of libraries #included in the program were noted and highlighted, but that is not likely to happen.

I can see that whomever chose to embed it, has it captured for the long-long haul. and no, I am no so inspired that I would re-write ever person who already has it in use....
what is most disconcerting is that I can not find how to use it when goggling, there is no description of it in the Learning center and except for a one phrase mention of it, it is as if it does not exist.

I can not find how to use it

What is "it" ?

is there a complete list of all keywords ?

No. Each library provides a list of keywords. Those words are highlighted in your code, whether you use the library or not.

The list of keywords on your computer is going to be different from the list on my computer.