function heilung()
{   if(tank!=null && tank.hp/tank.max_hp<0.65)
        {heal(tank)};
    if(healer!=null && healer.hp/healer.max_hp<0.65)
        {heal(healer)};
    if(dps!=null && dps.hp/dps.max_hp<0.65)
        {heal(dps)};
     if(leader!=null && leader.hp/leader.max_hp<0.65)
        {heal(leader)};
}