Firebird move horizontaly. At runtime, check if block is front. If block find, firebord U turn.
Speed and way of move is set by iXD (usually '2').
A positive value means firebird goto right, negative value firebird goto left.
iCounter is tile index display. Firebird has 4 pictures for right.
Firebird have picture when it turn.
If iCounter = 6 that means firebird change way next time.
Display the tile to change way (tile 8 or 9).
iXD multiplied by -1 next time.
If player hit firebird, object 37 (Fire hit player) is create and Colored bullet also. Firebird is kill.