probably the closest thing to this you could get would be to put some like neon red green pink or other really bright color that you would notice under the health bar that would be visible when the health bar is under 50% by just putting it in the middle(then it would be covered up as long as the health bar was high enough and when it isnt you would see the "bright thing". hopefully you understand what i mean. im sure that would help at least somewhat. since what he wanted isnt possible
