how do I make a part that plays an animation on a character when a player is touching the part ???

I'm trying to make realistic bed that when a player touches it a sleeping animation plays but they can still move even tho the player is doing an animation and when the player gets off the bed the animation stops playing

local part = script.Parent           --part the script is inside of
local sleepanim = part.sleepanimation  --the sleeping animation in the part
local touched = false

part.Touched:Connect(function(hit)
	local humanoid = hit.Parent.Humanoid
	if humanoid then
		touched = true
	elseif not humanoid then
		touched = false
	end
end)
part.Touched:Connect(function(hit)
	local humanoid = hit.parent.Humanoid
	local anim = humanoid:LoadAnimation(sleepanim)
	if humanoid and touched == true then
		anim:Play()
	elseif not humanoid and not touched == true then
		anim:Stop()
	end

I have no idea how the script above doesn't work so I need help

Well, I would not suggest you to use Touched event to detect when the player is not touching an object, because the event won't trigger until something is touching it. Instead , you can use Region3.

https://developer.roblox.com/en-us/api-reference/datatype/Region3

Example code[It is a Local Script] :

-- Turn the part Collisions off and cover your bed area with a part, CanCollide = false and Transparency of the part = 1

-- Variables --
local Found = false -- A boolean value

while wait(1) do -- Loops the code every on second
	local part = workspace.Part
	local region = Region3.new(part.Position - (part.Size/2), part.Position + (part.Size/2))
	local playerParts = workspace:FindPartsInRegion3WithWhiteList(region, game.Players.LocalPlayer.Character:GetDescendants())
	
	-- Now, we will loop through the playerParts and check whether the player is in the region
	for _, plr in ipairs(playerParts) do
		if part:FindFirstAncestor(game.Players.LocalPlayer.Name) then
			print("Player was found in the region")
			Found = true
			break
		else
			Found = false
			print("Player was not found in the region")
		end
	end
	
	-- Now, we will check if the value is true
	if Found then -- Alternative is Found == true
		-- Now, we have to fire to server to do the animation, you can either use RemoteFunction or RemoteEvent. here, we will be using remoteEvent but for safety, you can use RemoteFunction.
		game.ReplicatedStorage.RemoteEvent:FireServer()
	end
end

Now, I won't be providing the example code for ServerScript, because I believe there won't be no new thing you have to do it there.

Just play the animation on ServerSide and if you want the player to prevent any type of movement, you can just anchor the HumanoidRootPart, and when the animation ends, you can unanchor it.

Alt : If the anchor didn't work, you can put WalkSpeed and JumpPower to 0.

Lemme know if it helps!