Random quotes

HEllo,
I have made an empty nav bar which I want about 20 quotes to fade in and fade out sparatically with randomness, so when the bar is called upon, they don’t come up in the same order all the time. I know about AS fade in and fade outs and AS setintervels, I just dont know how to randomize the quotes and put it all together. If someone could lead me in the right direction I would greatly appreciate it.
THanks
d