Radar issue

//The radar blips are found in the code of the enemy tanks:
//unrelated code was removed to make it fit better

action eTank()   //the enemy tank
{
	PANEL* rDot;			//declare a panel pointer for the radar dot
	VECTOR rSpot;			//declare a vector to calculate the radar dot position
	var rSpt[2];			//an array for storing the x and y components of the radar dot's position

	//...sets basic parameters here, unrelated code

	rDot = pan_create(NULL,9999);						//create a panel for the radar dot (rDot)
	set(rDot,LIGHT);										//set its light flag
	rDot.size_x = 8;										//set its size
	rDot.size_y = 8;
	vec_set(rDot.blue,vector(200,0,0));				//make it blue
	
        //...more unrelated code, its healthbar is here

	while(my.health > 0)
	{
		//...basic movement, effects, ai, unrelated code

		if(vec_dist(my.x,player.x) < 3000)	//if the enemy is within 3000 units from the player, he's in radar range
		{
			if(!is(rDot,VISIBLE)) set(rDot,VISIBLE);	//if the radar dot is not visible, make it visible
			vec_set(rSpot,my.x);								//set rSpot to the tank's location
			vec_for_screen(rSpot,camera);					//convert rSpot to screen coordinates
			rSpt[0] = pSpot.x - rSpot.x;					//calculate the x componant of the vector to the player
			rSpt[1] = pSpot.y - rSpot.y;					//calculate the y componant of the vector to the player
			rDot.pos_x = radarPan.center_x + ((rSpt[0]/3000) * 64);	//calculate the x position
			rDot.pos_y = radarPan.center_y + ((rSpt[1]/3000) * 64);	//calculate the y position
		}
		else
		{
			//beep();
			if(is(rDot,VISIBLE)) reset(rDot,VISIBLE);
		}
		wait(1);		//avoid endless loops
	}
	reset(rDot,VISIBLE);
	ptr_remove(rDot);
        //...more unrelated code
}

//and this is the code that puts the radar scope on the screen

function initScreen()
{
	while(!player) { wait(1); }					//wait for the player to be loaded
	set(healthBar,VISIBLE | LIGHT);				//turn on the health bar and allow it to be set by RGB values
	set(radarPan,VISIBLE | TRANSLUCENT);		//turn on the radar scope, make it transparent
	radarPan.alpha = 10;								//radar scope is at an alpha of 10
	radarPan.scale_x *= 0.5;						//radar scope is half its original size
	radarPan.scale_y *= 0.5;
	radarPan.center_x = 0.5 * (bmap_width(radarMap));	//move the center of the scope to the middle of the bmap
	radarPan.center_y = 0.5 * (bmap_height(radarMap));
	vec_set(healthBar.blue,vector(0,200,0));	//health bar is green
	while(player)										//while the player exists
	{
		radarPan.angle -= 5 * time_step * (!freeze_mode);					//rotate the scope
		healthBar.size_x = 190 * (player.health / player.maxHealth);	//healthbar is a function of % of health
		wait(1);
	}
}