Animating

I had a go at playing around with a supplied 2D character sprite by adding and changing a few areas of the image. 

When adding anything to an animation, the changes must be carried over to each individual frame and at times changed slightly to blend in with the rest of the character's movement. 

The more frame there are in the animation the more time consuming and difficult working on it might be. This was a 12 frame animation of a girl walking which i added an extra to in the form of a mask. The mask could just be copied from one frame to another, but i need to make sure it followed the girls head movements as closely as possible else it would be detrimental to the animation's flow.