main := fn(): int {
    frame_buffer := @as(^u32, @bitcast(18446603339442421760));
    color := 0;
    loop {
        len := 786432*4;
        loop if len == 0 break else {
            fb := frame_buffer + @as(^u32, @bitcast(len));
            *fb = color;
            len -= 1;
            color += 100;
        }
    }
    return 0;
}