Shift To Run

game.Players.LocalPlayer:GetMouse().KeyDown:Connect(function(run)
if run == "0" then
local plr = game.Players.LocalPlayer.Name
game.Workspace[plr].Humanoid.WalkSpeed = "100"
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if not game.Workspace[plr]:FindFirstChild("Run") then
local running = Instance.new("Sound", game.Workspace[plr])
running.SoundId = "rbxassetid://520390529"
running.Name    = "Run"
running.Looped  = true
running.Playing = true

end
end
end)
game.Players.LocalPlayer:GetMouse().KeyUp:Connect(function(walk)
if walk == "0" then
local plr = game.Players.LocalPlayer.Name
game.Workspace[plr].Humanoid.WalkSpeed = "16"
game.Workspace[plr].Run:Destroy()
local running = Instance.new("Sound", game.Workspace[plr])
running.SoundId = "rbxassetid://140685098"
running.Playing = true
wait(1)
running:Destroy()


end
end)