does anybody have got an idea how to remove blood stains from furniture?

Hydrogen peroxide. I wouldn't leave it on too long b/c it can bleach things out, but maybe dab some one and rub it in then wet/dry vac it out. Good luck, I hope you didn't kill somebody or something, I wouldn't want to be an accessory to this all.

Corn starch can remove blood stains. Rinse the stain in cold water, then rub in moistened cornstarch. Place the item in the sun.

Ya,use hydrogen peroxide to remove blood from clothing or furniture. Rub gently.

Put a paste of water and cornstarch, cornmeal or talcum powder on fresh spots. Let dry and brush off.
Cover fresh or dried stains with meat tenderizer and add cool water. After 15 to 30 minutes, sponge off with cool water.
Fresh blood on leather? Dab on a little hydrogen peroxide. After it bubbles, wipe it off.
If you get blood on fabric, quickly wet a long piece of white cotton thread with saliva and place it across the spot. The thread will absorb the blood.