Can you help me with this function?

function move_power(){
	my.passable = on;
	my.size = 0.1;
	var c;
	while(vec_dist(me, player) > 10 && my. x > -200){
		ent_move(vector(-10, 0, 0), vector(-5, 0, 0));
		c = random(360);
		effect (minpart, 10, my.x, nullvector);
		wait(1);
		if(my.z < player.z){
			my.z += 5;
		}
		if(my.y > player.y){
			my.pan += 4;
			my.y -= 5;
		}
		else{
			my.pan -= 4;
			my.y += 5;
		}
	}
	ent_create("glow.tga", vector(player.x, player.y, player.z - 80), explosion_ring1);
	ent_remove(me);
}

#include <acknex.h>
#include <default.c>

ENTITY* ball;
ENTITY* ball2;


action action_ball()
{
	VECTOR velocity;
	var magnitude = 0.1;
	while(!key_space){wait(1);} //press space to start the chase!
	while(1)
	{
		vec_diff(velocity, ball2.x, me.x); 
		vec_normalize(velocity, magnitude);
		magnitude +=0.003;
		c_move(me, nullvector, velocity, IGNORE_MAPS);
		wait(1);
	}
}

action action_ball2()
{
	while(!key_space){wait(1);}
	while(1)
	{
		c_move(me,nullvector, vector(10*time_step,0,0),NULL);
		wait(1);
	}
}

function main()
{
	mouse_mode = 1;
	level_load("some_map.wmb");
	wait (2); 
	
 	
 	ball2 = ent_create ("ball.mdl", vector(-100, -200, 0), action_ball2);
 	ball = ent_create ("ball.mdl", vector(100, 100, 0), action_ball);
 	
 	
 	vec_set(camera.x, vector(0,0,600)); 	
 	while(1)
 	{
 		camera.pan -= mouse_force.x * 12 * time_step;
		camera.tilt += mouse_force.y * 8 * time_step;
		wait(1);
 	}	
}