How do I make things only show up on one client????

Through a local script, I turn particles on and off by enabling them. I also have filtering enabled on. The problem is, no matter what I do they always show up on all the clients. I tried cloning the particles through the local script and stuff, but it just never works. The script is in the starter character and I tried moving it to other places to see if it would work. I tried having the particles cloned from replicated first and replicated storage. I also tried testing in the studio and in just a normal Roblox server. Am I just dumb and not realizing that I have to do something else? The particles don't show up on the server, but on every single client.

All my script does is create a sound, play a sound, turn on some particles, wait for the sound to finish, then destroy the sound and then disable all the particles. I'll put some of that script if it helps but I really don't understand what is going on!

I really need help I've been looking up stuff on the internet for a couple of days now!

local replicatedfirst = game:WaitForChild('ReplicatedFirst')
local stuff = game.Workspace.TutorialStuff
local confetti1 = stuff.Confetti1
local confetti2 = stuff.Confetti2
local part = stuff["Confetti Trigger"]
local debounce = false
local player = game.Players.LocalPlayer

part.Touched:Connect(function(hit)
    if not hit.Parent:FindFirstChild("Humanoid") then return end
    if hit.Parent.Humanoid.Health == 0 then return end
    if debounce == true then return end
    debounce = true

    local particle1 = confetti1:GetChildren('ParticleEmitter')
    local particle2 = confetti2:GetChildren('ParticleEmitter')
    local sound = Instance.new('Sound')
    sound.Parent = hit.Parent
    sound.SoundId = 'rbxassetid://2762666255'
    sound.Name = 'PartySirens'
    sound.Volume = 0.5

    sound:Play()

    for i = 1, #particle1 and #particle2 do
        particle1[i].Enabled = true
        particle2[i].Enabled = true
    end
    repeat wait() until sound.TimePosition >= 6.3

    for i = 1, #particle1 and #particle2 do
        particle1[i].Enabled = false
        particle2[i].Enabled = false
    end
    sound:Destroy()
    debounce = false
end)

stuff = where everything is located in workspace

confetti1/2 = part that contains particles