help with walking animation

https://preview.redd.it/44czqktbckyg1.png?width=1520&format=png&auto=webp&s=5c271d787ecaec96f7f8073afb0417802e0bf485

as you can see in the picture, i have 4x4 pixel art of legs, i want to animate them moving right (or left) but i do not know how, no matter what i do it just looks bad as you can see:

https://i.redd.it/l1o4cow6dkyg1.gif