Your syntax is wrong in multiple areas. There is a comma delimiter, not a colon, and you have no end quotes.
that syntax is correct.
It is possible to nest if statements. It can get messy. I am certain there is a cleaner way, I just never had to expand beyond two or three choices.
The nested if looks like this:
I hope this helps. If you are satisfied, mark it as solved! Thanks and HAVE FUN!