Sword Art Onmine : Beginning

Key Enhancements

Dynamic Background: Added a static dark gray rectangle (0xFF333333) behind the health bar. It fills the empty space as health decreases, making the HUD look solid.

Animated Health (Smooth Lerp): Implemented Mth.lerp. Instead of snapping instantly, the bar glides smoothly to its new value when you take damage or heal.

Color Pulse (Flux): Used a sine wave based on System.currentTimeMillis() to make the colors "breathe." The bar subtly oscillates in brightness, giving it an energetic SAO feel.

Damage Flash: Added a flashTimer. Whenever your HP drops, the bar flashes white and fades back to its original color, providing strong visual feedback for hits.

Gradient Shading: Replaced flat colors with vertical gradients (top/bottom) to simulate depth and lighting on the bar.