The Dink Network

Ok, I've made a script for a boulder rolling back and forth across the room and killing Dink upon touch (See script below). Is there a way to check if another sprite than Dink touch the boulder and then take damage?

Here's the script so far.

void main(void)
{
	
	int &x = 0;
	sp_touch_damage(&current_sprite, -1);	
	sp_speed(&current_sprite, 5);	
	sp_base_walk(&current_sprite, 850);	
	roll:
	&x = sp_x(&current_sprite,-1);
	If(&x > 268)
	{
		move_stop(&current_sprite, 4, 157, 1);
	}
	else
	{
		move_stop(&current_sprite, 6, 400, 1);
	}	
	goto roll;			
}
void touch(void)
{
	sp_touch_damage(&current_sprite, 0);	
	freeze(1);
	&life = 0
	wait(100);
	sp_que(1, -1);
	goto roll;
}