I agree that you should probably use GUITextures for this. I've written some example code based on what it looks like you're trying to achieve. I'm sure this could be cleaned up a bit, as I know JS but I wouldn't say I was an expert. So my apologies if it's a little messy. I've added commenting to explain the different behaviors, and I hope I've done this adequately. Please let me know if you have any problems or questions.
//The GUITexture for the health. Create a GUITexture and assign the full
//health texture to it
var healthTexture : GUITexture;
//Then assign the corresponding health textures directly to these slots
var health0 : Texture2D;
var health1 : Texture2D;
var health2 : Texture2D;
var health3 : Texture2D;
var health = 100; //Starting health
var zeroThirdHealth = 0; //The amount of health that counts as none (I'm assuming it's 0)
var oneThirdHealth = 30; //The amount of health that counts as 1 third
var twoThirdHealth = 65; //The amount of health that counts as 2 thirds
var threeThirdHealth = 100; //The amount of health that counts as 3 thirds
//The GUITexture for the lives. Create a GUITexture and assign the full
//lives texture to it
var livesTexture : GUITexture;
//Then assign the corresponding life textures directly to these slots
var lives0 : Texture2D;
var lives1 : Texture2D;
var lives2 : Texture2D;
var lives3 : Texture2D;
var lives = 3; //Starting lives
//Is there a life 0? In other words, once the life count reaches 0, does the
//player die, or do they still have one more try?
var life0 = false;
//You can use this just to test the damage system beforehand. Just click
//the box in the inspector to call the ApplyDamage function with 35 damage
var testApplyDamage = false;
function Start () {
}
function Update () {
//Just for testing
if (testApplyDamage == true)
{
testApplyDamage = false;
ApplyDamage(35);
}
if (health > threeThirdHealth) //If health gets above the 3 thirds point, bring it back down
{
health = threeThirdHealth;
}
if (health = twoThirdHealth && health = oneThirdHealth && health zeroThirdHealth && health 1)
{
lives -= 1;
health = threeThirdHealth;
healthTexture.texture = health3;
//Add any sounds/effects for losing a life here
}
//If health is under or equal to the zero thirds point and the player had 0 lives
//left, they die. (This is if life0 is set to true)
if (health
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