action enemy_fight3 // attached to the enemy
{
while(!player) { wait(1); } 
...					
ent_vertex(my.sword_tip, 1840);
ent_vertex(my.sword_base, 306);
trace_mode = ignore_me + ignore_passable;
trace (my.sword_base, my.sword_tip);
if (result != 0)
{
//my.enable_impact = on;
my.event = player_damage;
effect (particle_blood, 2, target, normal);
if (you != null) {you.health -= 2 * time;}
ent_playsound (my, zombie_wav, 50); 
}
ent_cycle("attack", my.skill20); 
my.skill20 += 5 * time;
wait (1);
...

function player_damage()
{
if (you == player)
{

               ent_animate(my, "hurt", my._animdist, null);
               my._animdist += 3 * time_step; // "3" controls the animation speed
               wait (1);

}
}