How do I call the animation in this script into use?

It's a gun script. I need the reload animation to play when I press "r".

function reload(mouse)
	reloading=true
	mouse.Icon=ReloadCursor
	while sp.Ammo.Value<ClipSize and reloading and enabled do
		wait(ReloadTime/ClipSize)
		if reloading then
			sp.Ammo.Value=sp.Ammo.Value+1
			check()
		else
			break
		end
	end
	check()
	mouse.Icon=Cursors[1]
	reloading=false
end

function onKeyDown(key,mouse)
	key=key:lower()
	if key=="r" and not reloading then
		reload(mouse)
		sp.Handle.Reload:Play()
		local animation = Instance.new("Animation")
		animation.AnimationId = "http://www.roblox.com/Asset?ID=236490010" -- your id here

		local animTrack = sp.Parent.Humanoid:LoadAnimation(animation) -- chanhe Humanoid to the target's Humanoid
		animTrack:Play()


	end
end