How woud you make a mouse lock when peforming an action then, unlocking it?

I was working on a gun for my game and when you pull out the gun the mouse is locked on the screen, then when un-equip the gun the mouse become unlocked. My game just freezes then it says script timeout can anyone fix it? Script:

local gun = script.Parent

local player = game.Players.LocalPlayer

local Character = game.Players.LocalPlayer.Character
if not Character or not Character.Parent then
Character = game.Players.LocalPlayer.CharacterAdded:Wait()
end

local humanoid = Character:WaitForChild("Humanoid")

local uis = game:GetService("UserInputService")

local animation = Instance.new("Animation")

animation.Name = "Shoot"

animation.Parent = script.Parent



animation.AnimationId = "http://www.roblox.com/asset/?id=6688606392"

local animtrack = humanoid:LoadAnimation(animation)


local gun_shot = gun.Handle['Gun Shot']


local ReplicatedStorage = game:GetService('ReplicatedStorage')

local remoteEvent = ReplicatedStorage:WaitForChild('ShotEvent')

local shooting = false

local equipped = false

local mouse = player:GetMouse()

local mouseConnection

function UnlockMouse()
uis.MouseBehavior = Enum.MouseBehavior.Default

end

function lockMouse()
uis.MouseBehavior = Enum.MouseBehavior.LockCenter

end


gun.Equipped:Connect(function()



equipped = true
repeat until equipped == false

lockMouse()
end)

mouse.Icon = 'rbxassetid://117431027'



mouseConnection = mouse.Button1Down:Connect(function()

    shooting = true

    while shooting and equipped do

        remoteEvent:FireServer(gun.Handle.Position, gun.Handle.Orientation, mouse.Hit.p)
        animtrack:Play()
        gun_shot:Play()

        mouse.Button1Up:Connect(function()
            animtrack:Stop()
            shooting = false

        end)

        wait(0.1)

    end

end)

gun.Unequipped:Connect(function()

equipped = false
UnlockMouse()
mouseConnection:Disconnect()

end)

local uis = game:GetService("UserInputService")

local Runanim = Instance.new("Animation")
local NormalRunanim = Instance.new("Animation")
Runanim.AnimationId = "https://www.roblox.com/asset/?id=6689165237"
NormalRunanim.AnimationId = "https://www.roblox.com/asset/?id=6690951389"
local Ranim = humanoid:LoadAnimation(Runanim)
local NRanim = humanoid:LoadAnimation(NormalRunanim)

repeat wait() until game.Players.LocalPlayer

m = game.Players.LocalPlayer:GetMouse()

m.KeyDown:connect(function(key)
if key == "0" and shooting == false and equipped == true then --"Shift to run" 0 == shift
    print("Gun Running")
    Ranim:Play()
    game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 32
end
if key == "0" and shooting == false and equipped == false then
    print("Normal running")
    NRanim:play()
    game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 32--change "25" to your speed you want
end
end)

m.KeyUp:connect(function(key)
if key == "0" then
    Ranim:Stop()
    NRanim:Stop()
    game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 16 --change "16" to your speed you want when you stop running
end
end)

if shooting == true then
Ranim:Stop()
NRanim:Stop()
game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 16
end