An animated gif is a style of animation which allows various images (frames) in the file to be painted with time delays. An animated GIF file comprises a number of frames that are displayed in succession, each introduced by its own GCE, which gives the time delay to wait after the frame is drawn. Global information at the start of the file applies by default to all frames. The data is stream-oriented, so the file-offset of the start of each GCE depends on the length of preceding data. Within each frame the LZW-coded image data is arranged in sub-blocks of up to 255 bytes; the size of each sub-block is declared by the byte that precedes it.
By default, however, an animation displays the sequence of frames only once, stopping when the last frame is displayed. Since GIF is designed to allow users to define new blocks, Netscape in the 1990s used the Application Extension block (intended to allow vendors to add application-specific information to the GIF file) to implement the Netscape Application Block (NAB).
For use in media made by the Nunica Internet Social AllianceEdit
In the heyday of the Nunica Internet Social Alliance, animated GIFs were the first choice of media to upload to YTMND; this was used to give gimmicky animations when songs played on YTMND user NunicaMusicChannel and on activist messages from YTMND user Nisa before those accounts were sadly closed down by Max Goldberg.