gg = room_width - view_wview[0];
hh = room_height - view_hview[0];
if (view_xview[0] >= 0 && view_xview < gg)
{
    x = xhome + floor(view_xview[0] - (view_xview[0] * scrollspeed));
    g = x - xprevious;
    tile_layer_shift(1000100, g, 0);
    tile_layer_shift(1000002, g / 2, 0);
}
if (view_yview[0] >= 0 && view_yview[0] < hh)
{
    y = yhome + floor(view_yview[0] - (view_yview[0] * scrollspeed));
    h = y - yprevious;
    tile_layer_shift(1000100, 0, h);
    tile_layer_shift(1000002, 0, h / 2);
}