How to make a "health bar" ?

Question

Hi, I need a tutorial on how to create a "health bar" - I don't have a better word for it, but my idea is to have a bar (showing hapiness of a pet), and each time you push a button - the pet gains hapiness - and the "health bar" grows. What is this called, and is there a guide I can read telling me how to create such a code?

Answer 1

Hi it's me again - additional question 
So, I figured out how to stop the happybar from growing when it reached 100%. But when I press the CUTE button, it resets, nomatter how happy it is. Why?
Second problem: I want sound to stop from animations when I play a new animation. It works on all, except from my FOOD animation. If I put in my code the sounds stops on the animations that was running before BUT there is no sound on the FOOD animation either. Why?
stop();
//Happy bar
bar.width = 0;
var growValue:Number = 50;
cute_btn.addEventListener(MouseEvent.CLICK, growBar);
mad_btn.addEventListener(MouseEvent.CLICK, growBar);
leg_btn.addEventListener(MouseEvent.CLICK, growBar);
sove_btn.addEventListener(MouseEvent.CLICK, growBar);
function growBar(evt:MouseEvent):void
     bar.width += growValue;
  if(bar.width >= 250)
  bar.width = 250;
  cute_btn.removeEventListener(MouseEvent.CLICK, growBar);
  mad_btn.removeEventListener(MouseEvent.CLICK, growBar);
  leg_btn.removeEventListener(MouseEvent.CLICK, growBar);
  sove_btn.removeEventListener(MouseEvent.CLICK, growBar);
//Cute button
cute_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndPlayFromFrame_1);
function fl_ClickToGoToAndPlayFromFrame_1(event:MouseEvent):void
   gotoAndStop("nuttet");
   nuttet_mc.play();
cute_btn.addEventListener(MouseEvent.CLICK, fl_ClickToStopAllSounds);
function fl_ClickToStopAllSounds(event:MouseEvent):void
SoundMixer.stopAll();
//Play button
leg_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndPlayFromFrame_2);
function fl_ClickToGoToAndPlayFromFrame_2(event:MouseEvent):void
   gotoAndStop("leg");
   leg_mc.play();
leg_btn.addEventListener(MouseEvent.CLICK, fl_ClickToStopAllSounds_2);
function fl_ClickToStopAllSounds_2(event:MouseEvent):void
SoundMixer.stopAll();
//Food button
mad_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndPlayFromFrame_10);
function fl_ClickToGoToAndPlayFromFrame_10(event:MouseEvent):void
gotoAndStop("mad");
mad_mc.play();
/*mad_btn.addEventListener(MouseEvent.CLICK, fl_ClickToStopAllSounds_3);
function fl_ClickToStopAllSounds_3(event:MouseEvent):void
SoundMixer.stopAll();
//Sleep button
sove_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndPlayFromFrame_11);
function fl_ClickToGoToAndPlayFromFrame_11(event:MouseEvent):void
gotoAndStop("sove");
sove_mc.play();
sove_btn.addEventListener(MouseEvent.CLICK, fl_ClickToStopAllSounds_2);
function fl_ClickToStopAllSounds_4(event:MouseEvent):void
SoundMixer.stopAll();