How do I make an animated door?

In order to accomplish something like this, we need to use CFrame, and rotating.

Here is a basic cframing script that would move an object 10 times:

part = game.Workspace["'Brick"]
for i = 1, 10 do
part.CFrame = CFrame.new(part.CFrame.X, part.CFrame.Y + 1, part.CFrame.Z)
end

Note: I am on my school computer and unable to go to wiki.roblox.com to confirm this, I am just going off of what I believe to be true. I recommend going to the wiki and searching for examples of CFraming.

Using CFrames and updating it's position and rotation you can give a brick, or a model, the imitation of an "animation."

All it will take is practice.