///Declaring variables and drawing image
gamegridx = 4
gamegridy = 3
tile_size = 128
row = 0
col = 0
tile_width = background_get_width(bg_image)
tile_height = background_get_height(bg_image)
image = bg_image


gridx = tile_width / tile_size
gridy = tile_height / tile_size

repeat(gamegridx)
{
    repeat(gamegridy)
    {
        instance_create(col*tile_size, row*tile_size, obj_gridsquare)
        row++
    }
    row = 0
    col++
}

var inst;
inst = instance_nearest(0,0,obj_gridsquare);

with(obj_gridsquare)
{
    if inst = id
    {
        instance_destroy()
    }
}