------------------------------------------------------------------------------- 
   This function creates a GUI for doing animations. 
------------------------------------------------------------------------------- 
   Form: 
   x = AnimationGUI( action, a, b, c  ) 
------------------------------------------------------------------------------- 
 
   ------ 
   Inputs 
   ------ 
   action          (1,:)   Action to be taken by GUI (used mostly for callbacks) 
   a               (1,:)   Modifier to the action ("scData" for initialize case) 
   b               (1,:)   Modifier to the action ("tgtData" for initialize case) 
   c               (1,:)   Modifier to the action ("time" for initialize case) 
 
   ------- 
   Outputs 
   ------- 
   x 
 
-------------------------------------------------------------------------------