A recent update to Minecraft's PC version brought animated textures to Mojang's block-based world building sandbox and is available through an update posted on Mojang's blog by Jens Bergensten.
Released on Jan. 11, snapshot 13w02b, which is part of the developer's series of pre-release updates, includes bug fixes for 30 issues like crashes, malfunctioning textures and more, according to the developer's release notes. The animated texture addition allows players to assign animations to the game's textured components, which could be used to create anything from redstone trails to vast swaths of moving paths.
To get a sense of what's possible, you can check out a video experiment above from YouTube user Chandler Redding who used the update to build an amphitheater and add a singing He-Man to the game.
