How do I make it so when a player touches a certain part they play the swimming animation?

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1

How do I make it so when a player touches a certain part they play the swimming animation?

2

Place this in a LocalScript in StarterPlayerScripts (located in StarterPlayer)

local part = game.Workspace.Part -- replace with your part location
local debounce = false

part.Touched:Connect(function(hit)
	if game.Players:GetPlayerFromCharacter(hit.Parent) and debounce == false then
		local humanoid = hit.Parent:FindFirstChild("Humanoid")
		if humanoid then
			debounce = true
			humanoid:SetStateEnabled("GettingUp", false)
			humanoid:ChangeState(Enum.HumanoidStateType.Swimming)
		end
	end
end)

part.TouchEnded:Connect(function(hit)
	if game.Players:GetPlayerFromCharacter(hit.Parent) then
		debounce = false
		local humanoid = hit.Parent:FindFirstChild("Humanoid")
		if humanoid then
			humanoid:ChangeState(Enum.HumanoidStateType.Jumping)
		end
	end
end)
3 
local Enumeration = Enum
local Game = game
local Workspace = workspace
local Players = Game:GetService("Players")
local RunService = Game:GetService("RunService")
local Part = Workspace.Part

local function OnRenderStep()
	local Parts = Workspace:GetPartsInPart(Part)
	for _, Player in ipairs(Players:GetPlayers()) do
		local Character = Player.Character
		if not Character then continue end
		local Humanoid = Character:FindFirstChildOfClass("Humanoid")
		if not Humanoid then continue end
		local State
		for _, Descendant in ipairs(Character:GetDescendants()) do
			if not (Descendant:IsA("BasePart")) then continue end
			if table.find(Parts, Descendant) then State = true break end
		end
		Humanoid:SetStateEnabled(Enumeration.HumanoidStateType.GettingUp, not State)
		if State then Humanoid:ChangeState(Enumeration.HumanoidStateType.Swimming) end
	end
end

RunService.RenderStepped:Connect(OnRenderStep)

Local script.