How do i stop a looped animation from a different thread?

Hello im looking for stopping the equipped animation so it stops when its unequipped, also this is a server script inside a tool because i followed a tutorial and it said that, but i dont know how to stop it

local tool = script.Parent
local idlea = tool.Handle.Idle
local shoota = tool.Handle.Shoot
local muzzle = tool.Handle.mzzle

tool.Equipped:Connect(function()
	local character = tool.Parent
	local humanoid = character.Humanoid
	local idle = humanoid:LoadAnimation(idlea)
	idle:Play()
end)

tool.Activated:Connect(function()
	local character = tool.Parent
	local humanoid = character.Humanoid
	local shoot = humanoid:LoadAnimation(shoota)
	shoot:Play()
	muzzle.Transparency = 0.2
	wait(0.2)
	muzzle.Transparency = 1	
end)

tool.Unequipped:Connect(function()
	--Stop animation
end)

This is how. I'd also recommend not using wait(), use a delay function instead.

local tool = script.Parent
local idlea = tool.Handle.Idle
local shoota = tool.Handle.Shoot
local muzzle = tool.Handle.mzzle

tool.Equipped:Connect(function()
    local character = tool.Parent
    local humanoid = character.Humanoid
    local idle = humanoid:LoadAnimation(idlea)
    idle:Play()
end)


--with wait
tool.Activated:Connect(function()
    local character = tool.Parent
    local humanoid = character.Humanoid
    local shoot = humanoid:LoadAnimation(shoota)
    shoot:Play()
    muzzle.Transparency = 0.2
    wait(0.2)
    muzzle.Transparency = 1
end)

--with delay
tool.Activated:Connect(function()
    local character = tool.Parent
    local humanoid = character.Humanoid
    local shoot = humanoid:LoadAnimation(shoota)
    shoot:Play()
    muzzle.Transparency = 0.2
    delay(0.2, function()
    muzzle.Transparency = 1
end)
end)

tool.Unequipped:Connect(function()
    idle:Stop()
end)

local tool = script.Parent
local idlea = tool.Handle.Idle
local shoota = tool.Handle.Shoot
local muzzle = tool.Handle.mzzle
local character = tool.Parent
local humanoid = character.Humanoid
local idle = humanoid:LoadAnimation(idlea) -- idle now exists in this scope

tool.Equipped:Connect(function()
    idle:Play()
end)

tool.Activated:Connect(function()
    local character = tool.Parent
 
    local shoot = humanoid:LoadAnimation(shoota)
    shoot:Play()
    muzzle.Transparency = 0.2
    wait(0.2)
    muzzle.Transparency = 1 
end)

tool.Unequipped:Connect(function()
     idle:Stop() -- now it can acces idle and call the Stop function on it
end)

so basically i instantiated idle in a higher scope so that we can acces it now from the scope in Unequipped