////scr_bullet_explode(chunk size);

chunk = argument0; //this is how big your chunks will be in pixels

ww = sprite_get_width(sprite_index); //we need to know how wide
hh = sprite_get_height(sprite_index); //and how tall our sprite is

for (i = 0; i < ww; i += chunk)
{ //we loop 4 pixel at a time all the way across
    for (j = 0; j < hh; j += chunk)
    { //while picking all the vertical pixels in each column
        particle = instance_create(x+i, y+j, obj_particle); //we create a particle relative to the object, offset by the proper amount
        particle.spr = sprite_index; //we need to tell the particle which sprite to draw. in this case, it's drawing the sprite of the object that's creating it
        particle.size = chunk;
        particle.xx = i; //we'll need the particles to have these values so they can draw the right part of the sprite
        particle.yy = j;
    }
}




OBJECT: obj_particle


CREATE EVENT
direction = random(360); //this points the particle in a random direction.
speed = random_range(4,8); //this is how fast the particles will move
alarm[0] = random_range(30,60); //this will determine how long a particle exists before destroying it
motion_set(direction,speed); //this tells the particle to start moving

ALARM EVENT
instance_destroy();

DRAW EVENT
draw_sprite_part(spr,-1,xx,yy,size,size,x,y);