How do you make a random event type script?

Yeah. First figure out how to code the event. Then make a function that cycles them every few minutes or something using math.random with a loop.

I would program each event as some sort of function or something to make life easy.

--Need to store our event functions
Events = {EventFunction1,EventFunction2} --etc.

--where an event function might look like:

function EventFunction()
    game.Lighting.TimeOfDay = 0
    wait(30)
    game.Lighting.TimeOfDay = 30
end

--need the loop to run everything.

while wait() do
    Events[math.random(1,#Events)]()
end

This code will not work, it's designed to give you the blocks and understanding you need. That's the principle, good luck figuring out the rest.