This mod takes a somewhat hacky approach to adding a shaking and flashing animation to the heart bar in Mineclone 2.
Example: Gif Link
3.0 - Fixed and improved most of the code in the mod. Now it should actually work as well as adjusting for creative/survival mode. Also changed the hearts to flash three times for taking damage and twice for healing (actually like minecraft).
2.1 - Fixed the background not flashing sometimes
2.0b - Added a shaking animation when low on health (4 hp or less)
1.1 - Changed the animation so that it flashes twice for damage but only once for healing. (More like Minecraft).
1.0 - Added basic flashing animation