For a Bitmap, you can set or modify the Time parameters listed below.
These parameters let you change the start time and speed of flics and AVI files used as animated texture maps. They make it much easier to use sequences of images as maps in scenes, because you can control the timing very precisely
Start Frame: Specifies the frame that the playback of the animated map will begin.
Playback Rate: Lets you speed up and slow down the rate that the animation is applied to the map. (1.0 is normal speed, 2.0 is twice as fast, .333 is 1/3 as fast, etc.)
Determines what happens after the last frame of the animation.
Loop: Causes the animation to loop over and over again.
Ping-Pong: Causes the animation to be played backwards, effectively making every animated sequence “loop smoothly.”
Hold: Causes the last frame of the animation to be frozen on the surface until the end of the scene.