1. local character = script.Parent
2. local humanoid = character:WaitForChild("Humanoid")
3.  
4. local contextActionService = game:GetService("ContextActionService")
5.  
6. local running = false
7.  
8. local runAnim = Instance.new("Animation")
9. runAnim.AnimationId = "rbxassetid://5832447211"
10.  
11. local loadedRun = humanoid:LoadAnimation(runAnim)
12.  
13. --//Functions
14.  
15. local function handler(actionName, inputState, inputObject)
16.   if actionName == "Run" then
17.     if inputState == Enum.UserInputState.Begin then
18.       humanoid.WalkSpeed = 26
19.       loadedRun:Play()
20.       running = true
21.     end
22.     if inputState == Enum.UserInputState.End then
23.       if loadedRun.IsPlaying then
24.         loadedRun:Stop()
25.       end
26.       humanoid.WalkSpeed = 16
27.       running = false
28.     end
29.   end
30. end
31.  
32. contextActionService:BindAction("Run", handler, false, Enum.KeyCode.LeftShift)
33.  
34. while wait() do
35.   if humanoid.MoveDirection.Magnitude <= 0 and running then
36.     if loadedRun.IsPlaying then
37.       loadedRun:Stop()
38.     end
39.     humanoid.WalkSpeed = 16
40.     running = false
41.   end
42. end
43.  
44. humanoid.Jumping:Connect(function(active)
45.     if active == false and running == true then
46.       loadedRun:Play()
47.     end
48. end)