Could you explain how the sand animation is supposed to be set up?
Viewing post in Pixel Art Tileset - Desert Sands comments
It's a 4-frame looping animation. You slice the sheet 16x32 (that's in the filename). Run the loop at whatever speed works for you. You can run it mirrored or rotated horizontally. Look at the preview image on this page that says "Includes a variety of desert vegetation" to see the animation in action.