local UserInputService = game:GetService("UserInputService")

local Players = game:GetService("Players")

local player = Players.LocalPlayer

local character = player.Character or player.CharacterAdded:Wait()

local humanoid = character:WaitForChild("Humanoid")

local crouching = false

local normalWalkSpeed = 16

local crouchWalkSpeed = 8

local crouchAnimation = Instance.new("Animation")

crouchAnimation.AnimationId = "rbxassetid://CROUCHANIMATIONID"

local crouchTrack = humanoid:LoadAnimation(crouchAnimation)

UserInputService.InputBegan:Connect(function(input, gameProcessed)

if gameProcessed then return end

if input.KeyCode == Enum.KeyCode.C then

crouching = not crouching

if crouching then

humanoid.WalkSpeed = crouchWalkSpeed

crouchTrack:Play()

else

humanoid.WalkSpeed = normalWalkSpeed

crouchTrack:Stop()

end

end

end)