how to create animated billboard texture (Grass,Leaves ) ?

i want animated grass,hairs,leaves for my game where will find billboard textures for free ?
and also how to animate those grasses and leaves

Spirite sheets . And you ca create them with blender and render them.

how to use sprite sheets ? what is sprite sheets ?

Maybe an image with multiple frames?

From my testing a “SPRITE SHEET” is one image that contains all the frames of an animated sequence. The lower left corner is frame 1 and continues to the lower right corner before continuing on the next row. The upper right corner should be the last frame in the sequence.

Once the texture is applied to the mesh, open the properties window in the image editor, and select animate, the frame range, and the tile information.