i have a blood particle code but it does not work in my game..
there's no error but the blood particles not run in my code...

this is my code

BMAP* blood_particle_bmap = "red_dot.tga";

function blooddrop_partikel_function(PARTICLE *p)
{
p.alpha -= 2*time_step;
if (p.alpha <= 0) p.lifespan = 0;
}

function blooddrop_effect(PARTICLE *p)
{
p.size = 4;
p.alpha = 100;
p.gravity = 2;
p.bmap = lblood_particle_bmap;
p.vel_x = random(10)-5;
p.vel_y = random(10)-5;
p.vel_z = random(5)+5;
p.flags |= MOVE;
p.event = blooddrop_partikel_function;
}

i dont know how to put in my AI someone please help me...