if (instance_exists(obj_shaker) == 0)
{
    if (on == 1)
    {
        view_xview[0] = round((obj_mainchara.x - (view_wview[0] / 2)) + 10);
        view_yview[0] = round((obj_mainchara.y - (view_hview[0] / 2)) + 10);
    }
}
if (on == 1)
{
    x = view_xview[0] + stayx;
    if (x >= (room_width - view_wview[0]))
        x = room_width - view_wview[0];
    y = view_yview[0] + stayy;
    if (y <= 200)
        y = 200;
    if (view_yview[0] <= 0)
        view_yview[0] = 0;
}
if (view_yview[0] <= 0)
    view_yview[0] = 0;