block = instance_position(xx + 10, yy + 10, obj_solidparent);
if (block != -4)
{
    block.x = 0;
    block.y = 0;
}
new = instance_create(xx, yy, obj_npc_marker);
new.depth = 850000;
new.sprite_index = spr_bridgeseed;
new.image_speed = 0;
new.image_index = 6;
new.visible = true;
new.image_speed = 0;