scrollspeed[0] = 0.1;
scrollspeed[1] = 0.3;
scrollspeed[2] = 0.5;
scrollspeed[3] = 0.6;
scrollspeed[4] = 0.7;
scrollspeed[5] = 0.8;
scrollspeed[6] = 0.9;
for (i = 0; i < 7; i += 1)
{
    xxx = view_xview[0];
    if (xxx > (room_width - 320))
        xxx = room_width - 320;
    if (xxx >= 0)
        background_x[i] = floor(xxx - (xxx * scrollspeed[i]));
    gg = room_width - 320;
    if (xxx >= (room_width - 320))
        background_x[i] = 0 + floor(gg - (gg * scrollspeed[i]));
}