My animation won't play on a rig in my game?

I don't know if this counts, But I made an animation for a character in a game and the animation won't play. I've put it in Humanoid I've tried Switching to R15 that didn't work either. I might just be dumb.

Instead of putting the animation in the rig, try playing the animation through a script:

Asset = "http://www.roblox.com/Asset?id="
IDs = {} -- upload your animation to roblox and put the id in here
Anims = {}
AnimsL = {}
Human = script.Parent:WaitForChild("Humanoid")

for i=1, #IDs do
	local Anim = Instance.new("Animation")
	Anim.AnimationId = (Asset..IDs[math.random(1,#IDs)])
	table.insert(Anims,Anim)
	wait()
end

for i=1, #Anims do
	local AnimL = Human:LoadAnimation(Anims[i])
	table.insert(AnimsL,AnimL)
	wait()
end


while true do
	local Dance = AnimsL[math.random(1,#AnimsL)]
	Dance:Play()
	wait(15)
end

-- Make sure to put this in a r15 model character or it won't work.

By the way, I'm bad at math so the parts that use math.random I didn't make ok?