Forums Scripts & Popups how do i get my bot to select random line

ok, so im really new to this, i got the basics down, but i dont know how to get the bot to just pick a random line on a command.

for example i have:
on *:JOIN:#: { msg $chan Welcome $nick }


now i want for example 3 different welcome lines, for example:
welcome to the channel, $nick
Hello there, $nick
good evening $nick

is there any possibilty to do this?
ive looked for like 5 hours all around the internet, but apparently i dont have the right search terms or im just stupid.

thx for the help, cheers!