The Dink Network

So I've been trying to incorporate this mana system into my D-Mod. To do this, I've edited the fireball script. The mana system itself works perfectly like this, but I've run into a problem. Whenever I change screens, random sprites begin randomly disappearing. It makes no sense whatsoever. I've managed to track it down to the sp_kill(&t1, 1); command. If I remove it from the loop, it'll stop removing the sprites, but I need that command to make the mana system work. And I can't seem to find any other command that would serve the same purpose, except for sp_active(&t1, 0);, but in that case it'll start removing the sprites, as well. I've tried everything and I'm really stumped. Anyone know what could be causing this?

Here's the whole fireball script:

void use( void )
{

&mydir = sp_dir(1, -1);

if (&mana > 2)
{
//disallow diagonal fireballs for now

if (sp_dir(1, -1) == 1)
    sp_dir(1, 4);
if (sp_dir(1, -1) == 3)
    sp_dir(1, 6);
if (sp_dir(1, -1) == 7)
    sp_dir(1, 4);
if (sp_dir(1, -1) == 9)
    sp_dir(1, 6);

&basehit = sp_dir(1, -1);
&basehit += 320;

sp_seq(1, &basehit);
sp_frame(1, 1); //reset seq to 1st frame
sp_kill_wait(1); //make sure dink will punch right away
sp_nocontrol(1, 1); //dink can't move until anim is done!
 &magic_level = 0;
 draw_status();
 &mholdx = sp_x(1, -1);
 &mholdy = sp_y(1, -1);
//freeze(1);

 wait(100);

if (&mydir == 1)
  {
  &mholdx -= 30;
  &junk = create_sprite(&mholdx, &mholdy, 11, 504, 1);
  sp_seq(&junk, 504); 
  sp_mx(&junk, -6);
  sp_my(&junk, +2);

  }

if (&mydir == 4)
  {
  &mholdx -= 30;
  &junk = create_sprite(&mholdx, &mholdy, 11, 504, 1);
  sp_seq(&junk, 504); 
  sp_dir(&junk, 4);
  }

if (&mydir == 6)
  {
//  &mholdy -= 10; 
  &mholdx += 30;
  &junk = create_sprite(&mholdx, &mholdy, 11, 506, 1);
  sp_seq(&junk, 506); 
  sp_dir(&junk, 6);
  }

if (&mydir == 3)
  {
  &mholdx += 30;

  &junk = create_sprite(&mholdx, &mholdy, 11, 506, 1);
  sp_seq(&junk, 506); 
  sp_mx(&junk, +6);
  sp_my(&junk, +2);

  }

if (&mydir == 2)
  {
  &junk = create_sprite(&mholdx, &mholdy, 11, 502, 1);
  sp_seq(&junk, 502); 
  sp_dir(&junk, 2);
  }

if (&mydir == 7)
  {
  &mholdx -= 30;
  &junk = create_sprite(&mholdx, &mholdy, 11, 504, 1);
  sp_seq(&junk, 504); 
  sp_mx(&junk, -6);
  sp_my(&junk, -2);

  }

if (&mydir == 8)
  {
  &junk = create_sprite(&mholdx, &mholdy, 11, 508, 1);
  sp_seq(&junk, 508); 
  sp_dir(&junk, 8);
  }

if (&mydir == 9)
  {
  &mholdx += 30;
  &junk = create_sprite(&mholdx, &mholdy, 11, 506, 1);
  sp_seq(&junk, 506); 
  sp_mx(&junk, +6);
  sp_my(&junk, -2);

  }

//create fake shadow effect
playsound(17, 8000,0,&junk,0);

  sp_timing(&junk, 0);
  sp_speed(&junk, 6);
  sp_strength(&junk, 20);
  sp_range(&junk, 10);
  //this makes it easier to hit stuff
  sp_flying(&junk, 1);
  sp_script(&junk, "dam-fire");
  //when the fireball hits something, it will look to this script, this way
  //we can burn trees when appropriate
  &mshadow = create_sprite(&mholdx, &mholdy, 15, 432, 3);
  sp_brain_parm(&mshadow, &junk);
  sp_que(&mshadow, -500);
  //will be drawn under everything

  //set fireball to not be able to damage Dink or the shadow
  sp_brain_parm(&junk, 1);
  sp_brain_parm2(&junk, &mshadow);
&mana -= 3;
goto loop;
}
unfreeze(1);
goto loop;
}

void disarm(void)
{
&magic_cost = 0;
sp_kill(&t1, 1);
kill_this_task();
}

void arm(void)
{
Debug("Preloading fireball");

int &basehit;
int &mholdx;
int &mholdy;
int &junk;
int &mshadow;
int &mydir;
&magic_cost = 100;
preload_seq(322);
preload_seq(324);
preload_seq(326);
preload_seq(328);
preload_seq(502);
preload_seq(504);
preload_seq(506);
preload_seq(508);

//tree burn
preload_seq(20);

//explosion
preload_seq(70);

int &t1;
loop:
sp_kill(&t1, 1);
&t1 = say_xy("&mana / 100", -50,455);
sp_kill(&t1, 0);
wait(200);
goto loop;

}

void pickup(void)
{
Debug("Player now owns this item.");
kill_this_task();
}

void drop(void)
{
Debug("Item dropped.");
kill_this_task();
}

It kills random sprites because when you change screens, the text sprite &t1 stops existing. "&t1" (or &crap, or &text, or any variable name) is just a stand-in for the sprite's sprite number, so when you change screens, it kills some sprite that just happens to have the same sprite number that &t1 had.

To fix, you could do something like this:

loop:
if (&crap == &player_map)
sp_kill(&t1, 1);
&t1 = say_xy("&mana / 100", -50,455);
sp_kill(&t1, 0);
int &crap = &player_map
wait(200);
goto loop;

If &crap doesn't equal &player_map, that means they changed screens during the wait(200), &t1 doesn't exist anymore, and so we shouldn't try to kill it.

Alternatively, this might work:

loop:
&t1 = say_xy("&mana / 100", -50,455);
sp_kill(&t1, 200);
wait(200);
goto loop;

Woah, used that above script and it seems to work perfectly now! I'd have never thought about that. Quite frankly, I still don't exactly see how it works, but I'm not questioning it. xD Thanks a lot!