How To Make A Double Tap W Script to Sprint that Runs animations and stops them?

I've been trying to make a script that will Sprint and play the animation on the player pressing W twice. I am also having trouble trying to find out how to make the animation stop after the player is done holding the double W. I also need to know how to make the walkspeed and camera zoom go back to normal after the holding is lifted.

 local player = game.Players.LocalPlayer
repeat wait() until player.Character.Humanoid
local humanoid = player.Character.Humanoid
local mouse = player:GetMouse()


local anim = Instance.new("Animation")
anim.AnimationId = "http://www.roblox.com/asset/?id=4681457024"

local keyConnection = mouse.KeyUp:connect(function (key)
end)
local DoubleDebounce = false
    local UserInputService = game:GetService('UserInputService')
    local TargetKeyCode = Enum.KeyCode.W

    UserInputService.InputBegan:Connect(function(input,gameEvent)
        if not gameEvent and input.KeyCode == TargetKeyCode then
            if not DoubleDebounce then
                DoubleDebounce = true
                spawn(function()
                    wait(1) --Interval of time where the player can double tap a key
                    DoubleDebounce = false
                end)
            elseif DoubleDebounce then
        local playAnim = humanoid:LoadAnimation(anim)
   playAnim:Play()
        for i = 1,5 do
                game.Workspace.CurrentCamera.FieldOfView = (70+(i*2))
                wait()
                end
            game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 24
            repeat wait () until false == false
            DoubleDebounce = false
            keyConnection:disconnect()
game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 16
            for i = 1,5 do
                game.Workspace.CurrentCamera.FieldOfView = (80-(i*2))
                wait()
            end
        end
    end
    end)