How to make math.random choose a number every second?

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1

so i have a script that uses math.random to choose if there is going to be rain in the map but i’m not sure how to change the value every one second. How can i do this?

local lighting = game:GetService("Lighting")

local SS = game:GetService("ServerStorage")

local chanceOfRain = math.random(1,15)

local minutes = 7 * 60

while wait() do
	lighting:SetMinutesAfterMidnight(minutes)
	minutes = lighting:GetMinutesAfterMidnight()
	minutes = minutes + .1
	
	if minutes > 19 * 60 then
		minutes = minutes + 3
	elseif minutes > 7 * 60  then
		minutes = minutes + 1
	else 
		minutes = minutes + 3
	end
	
	if chanceOfRain == math.random(1,15) then
		local rain = SS:WaitForChild("Rain"):Clone()
		rain.Parent = workspace
		workspace.RainSounds:Play()
		workspace.RainSounds.Looped = true
		wait(math.random(50, 200))
		rain:Destroy()
		workspace.RainSounds:Stop()
	end
end
2

how about making a new instance that’s gonna be an int value, then another script that changes that value every 1 second ?

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