How to do something while an animation is playing?

This is how you play an animation:

local animation = Instance.new("Animation")
	animation.AnimationId = "http://www.roblox.com/Asset?ID=144884906"
	 
	local animTrack = Humanoid:LoadAnimation(animation)
	animTrack:Play()

Would I put something like:

while animTrack:Play() do

Thanks.

I agree with Tkdriverx. You should use the KeyframeReached event for doing something. Something like this, maybe?

animTrack.KeyframeReached:connect(function(keyframeName)
if keyframeNAme ~= "End" then
--do stuff here
end
end)

KeyframeReached wiki link