4. Making the health bar: Make a movie clip. name the instance "Health". inside that movie clip, make a bar. put the fill-in on another layer. make lots of keyframes, and on each keyframe, make the heald go down a bit. Its easier if you use motion tween. on the first frame, put these actions in:
stop();
and on the last frame, put these actions in:
tellTarget ("_parent.") {gotoAndStop("loose");}
Go into the enemies properties, and put these actions in right when the weapon or something hits you: