How do I Make my Animation Move an NPC Forward?

I am very new to animation, so I apologize if this is a dumb question with a simple answer. I created a very simple walk animation that lasts 1 second, and moves the humanoid forward 2 studs. Then, in a server script, I created a loop to run the animation 20 times to move the NPC forward. However, once it completes the animation, it moves back to it's original position and does the animation again, instead of progressively walking forward. Here is my script if it will help:

Dummy = game.Workspace.Dummy
Animation = game.Workspace.Animation
LoadedAnimation = Dummy.Humanoid:LoadAnimation(Animation)

for i = 1,20,1 do
    loadedAnimation:Play()
    wait(1)
end

As I said before, I am very new to animation, so I apologize if this is a dumb question. Thank you for reading!