This is a test for the HP bars that may be used for Pokémon Sienna Fusion collaboration. First enter in the Max HP of both players. Drag the sliders to determine how much you want to lower either player's HP, then click the square next to it to drop it. If I made this right, then the HP bar should move according to how much HP the player has, and always empty out when at or below 0.
Pokémon Black and White sprites.