The Dink Network

Sure, just make sure that both loops are in different scripts.

Something like this:

Wizard's script:

void main(void)
{
&global = &current_sprite;
spawn("fireloop");
loop:
move_stop(&current_sprite,4,x,1);
move_stop(&current_sprite,6,x,1);
goto loop;
}

Fireloop.c:

void main(void)
{
script_attach(0);
int &wizx;
int &wizy;
int &sprite;
loop:
&wizx = sp_x(&global,-1);
&wizy = sp_y(&global,-1);
&sprite = create_sprite(&wizx,&wizy,brain,seq,frame);
//Fire fireball
goto loop;
}

Note: scripts have not been tested, use at own risk.
EDIT: Also, there are ways of doing this without using a global variable, but generally I use some 'general purpose globals' that can be used whenever I feel like it on a specific screen.