Hey! You can add a very cool effect, if you put the blood stain a bit more to the center of the screen. The Start/Load/End Thing will hide the blood. After pressing start, you teleport to an empty Map with the same Picture as a background. So the players will see the blood stain after starting the game.
After that, you can even use pictures to let the blood run down the floor.

blood stain = blood on the Floor = Blutfleck