How to pause and unpause animation based on Character Movement?

I want a script that uses crouching animation, and when pressing a key it enables (but animation speed is 0) when character is moving animation speed is 1, and when character stops moving animation speed is 0 again. If they press the hotkey again, they are back to walking.

I have a script but there’s a problem where it only detects when I press the hotkey, not while I am walking. Video showing problem & what I want: https://drive.google.com/file/d/1q_DGXxo3Hxlfujl1KzhPNL-SYIrgYnJU/view

The script I have currently:

local Hotkey = "C"
local PlayerSerivce = game:GetService("Players")
local Player = PlayerSerivce.LocalPlayer
local Character = Player.Character
local Humanoid = Character:WaitForChild("Humanoid")
local AnimationID = game:GetService("ReplicatedStorage").Crawl.AnimationId
local CharacterAnimation
game:GetService("UserInputService").InputBegan:Connect(function(inputObject, gameProcessedEvent)
    if inputObject.KeyCode == Enum.KeyCode[Hotkey] then
        animation()
    end
end)
function animation()
    if Character then
        local CrawlAnimation = Character:FindFirstChild("AnimationCharacter")
        if CharacterAnimation then
            CharacterAnimation:Stop()
        end
        if CrawlAnimation then
            if CrawlAnimation.AnimationId == AnimationID then
                CrawlAnimation:Destroy()
                return
            end
            CrawlAnimation:Destroy()
        end
        local Animation =Instance.new("Animation",Character)
        Animation.Name = "AnimationCharacter"
        Animation.AnimationId = AnimationID
        CharacterAnimation = Character.Humanoid:LoadAnimation(Animation)
        if Humanoid.MoveDirection.Magnitude > 0 then
            CharacterAnimation:Play()
            CharacterAnimation:AdjustSpeed(1)
        end
        if Humanoid.MoveDirection.Magnitude <= 0 then
            CharacterAnimation:Play()
            CharacterAnimation:AdjustSpeed(0)
        end
    end
end