{okey... let's see...
Header:
     NumFrames:word;                     (* Number of frames-1 *)
     length:array[0..NumFrames] of word; (* length (in bytes) of every frame *)
then come the single frames;
     AnimFormat:byte;                    (* Size of one row (128/64/32/16/8/4 bytes) *)
     Marker:byte;                        (* Marker used for RLE *)
     Data:array[1..length[Actual_Frame]] of byte;}
