How can I run 2 events at the same time?

Try making new threads:

Either by function spawn or manipulating with coroutines.

-> https://developer.roblox.com/en-us/articles/Beginners-Guide-to-Coroutines

Here's my example:

-- This whole script is just one big thread. Code runs here
coroutine.resume(coroutine.create(function() -- This creates a thread with the provided function and runs it .
    repeat
        print('wow coroutine 1')
        wait(3)

    until workspace:FindFirstChild('Stop')
end))
coroutine.wrap(function()-- this does both of them once but with the two parenthesis at the End
    repeat
        print('wow coroutine 2')
        wait(3)
    until workspace:FindFirstChild('Stop')
end)()

print('wow coroutine 3')-- since both loops are in two different threads this print function will work