function main() 
{
	fps_max = 60; // limit the number of data packets that are sent over the network each second to 60
	level_load ("multiplayer10.wmb");
	camera.ambient = 120;
	on_mouse_left = fire_bullets; // the player use the left mouse buttons to fire
	if (!connection) // no server could be found?
		sys_exit(NULL); // then shut down the engine
	if (connection == 2)  // this instance of the game runs as a client?
	{
		my = ent_create("redsoldier.mdl", vector (100, 50, 40), move_players); // then create the red soldier!		
		wait (-0.5); // wait until the handle is ready and valid for all the clients (this line is very important!)
		client_ent = handle(my); // now we can get a valid handle to the client entity (the player that runs on the client)
		send_var(client_ent); // and let's send the handle over the network to the server (no need to do that more than once)
		while (1) 
		{			
			my.skill1 = 5 * (key_w - key_s) * time_step;
			my.skill2 = 4 * (key_a - key_d) * time_step;
			send_skill(my.skill1, SEND_VEC); // send skill1...3 to the server (skill3 is used to store player's health
			send_var(client_fired); // send client_fired to the server; even client's bullets are created on the server
			simple_camera(); // call the simple camera function
			// new code
			players_health = my.health; // display the proper player health value on the client
			wait (1);
		}
	}
	if (connection == 3) // this instance of the game runs as a server and client at the same time? (connection = 3)
	{
		my = ent_create("bluesoldier.mdl", vector (-100, -50, 40), move_players); // create the blue soldier
		VECTOR bullet_pos[3];
		while (1) 
		{
			my.skill1 = 5 * (key_w - key_s) * time_step;
			my.skill2 = 4 * (key_a - key_d) * time_step;
			simple_camera(); // call the simple camera function
			// new code
			players_health = my.health; // display the proper player health value on the server
			
			if (server_fired) // the server has fired? Then we've got everything that we need here ("my" is the player on the server)
			{
				vec_set(bullet_pos.x, vector (30, -5, 15)); // create the bullet at an offset of x = 30, y = -5, z = 15
				vec_rotate(bullet_pos.x, my.pan); // in relation to the origin of the model
				vec_add(bullet_pos.x, my.x);
				bullet_pan = my.pan; // the bullet will have the same pan angle with player's pan
				if (my.health > 0) // the server player is still alive?
					ent_create("bullet.mdl", bullet_pos.x, move_bullets); // then create the server player bullets
			}
			if (client_fired) // the client has fired? Then we need to get access to the client player
			{
				beep(); // See if client mouse left button is seen! IT IS !!!!
				
				you = ptr_for_handle(client_ent); // let's restore its handle; the client player is now "you"
				
				// We are not 'seeing' you as the client soldier's data but as the server soldier's data!!!!!!!!
				// =============================================================================================
				
				vec_set(bullet_pos.x, vector (30, -5, 15)); // we set bullet_pos to the same offset
				vec_rotate(bullet_pos.x, you.pan); // in relation to the "you" model (client's player)
				vec_add(bullet_pos.x, you.x);
				bullet_pan = you.pan; // and we use client's player pan angle for the bullet
				if (you.health > 0) // the client player is still alive?
					ent_create("bullet.mdl", bullet_pos.x, move_bullets);	// then create client's bullets (on the server as well)

				vec_set(bullet_pos.x, vector (30, -5, 15)); // we set bullet_pos to the same offset
				if (you.health  > 0) // Test Code! This adds 15 to Server, NOT Client????????????
					you.health += you.health ;
			}
			wait (1);
		}
	}
}