How would I make a key input work serverside?

Im trying to make a gun flash however other players cant see it. How would I make this script work serverside so that other players can see it?

local Flash = script.Parent

local UserInputService = game:GetService("UserInputService")
local Tool = script.Parent
local Player = game.Players.LocalPlayer

UserInputService.InputBegan:Connect(function(InputObject)
    if InputObject.UserInputType == Enum.UserInputType.MouseButton1 then
       Flash.Enabled = true
if Flash.Enabled == true 
then
    wait(0.01)
    Flash.Enabled = false
end       
    end
end)