Showing blood effects only once

[Stryke]

To check if a player has been hit:

PHP Code:

//#CLIENTSIDE
function onActionProjectile()
{
  triggerserver("weapon", this.name, "BloodFX", player.x + 1.25 + random(0,0.5), player.y + 1 + random(0,1.5));
} 


To make blood effects

PHP Code:

function onActionserverside()
{
  if (params[0] == "BloodFX")
  {
    temp.i = putnpc2(params[1], params[2], "");
    temp.i.join("bloodfx");
  }
} 


If I do this, the blood effects appear as much times as the amount of players there are on the level. How do I get around this to only show once? The blood effect is a GANI.