How do I run basically a script in a script?

I have a piece of code that changes the text in the text-label, which by the way is a bar on top. This works fine but I want for the script, while its changing the text of the textLabel, to check if a part has been touched. Here is the (local) script:

math.randomseed(tick())
local player = game.Players.LocalPlayer
local playerGui = player.PlayerGui
local bar = playerGui:WaitForChild("Bar")
local redDetector = workspace.RedDetector
local blueDetector = workspace.BlueDetector


local RandomSentences = {"How's everyone?",
	"Make sure to leave a like ;)",
	"This is the update bar!",
	"The easiest way to make a goal is with teamwork!",
	"Make sure you have defense!",
	"Buy a VIP server to play with only your friends!"
}


while true do
	wait()
     	bar.TextLabel.Text = RandomSentences[math.random(1,6)]
	wait(100)
end

While the script is running(specifically the while true loop) I want it to check if a part called redDetector or blueDetector(which are in the variables section) have been touched. I dont know if this is an easy add-on or if I need something more advanced like coroutines. Thanks.