display = XOpenDisplay(getenv("DISPALY"));
    screen = DefaultScreen(display);
    depth = DefaultDepth(display,screen);
    printf("depth: %dn", depth);
    rootwindow = RootWindow(display,screen);

    XVisualInfo vinfo;
    XMatchVisualInfo(display, DefaultScreen(display), 32, TrueColor, &vinfo);

    XSetWindowAttributes attr;
    attr.colormap = XCreateColormap(display, DefaultRootWindow(display), vinfo.visual, AllocNone);
    attr.border_pixel = 0;
    attr.background_pixel = 0;

    window = XCreateWindow(display, DefaultRootWindow(display), 0, 0, 1440, 900, 0, vinfo.depth, InputOutput,
                    vinfo.visual, CWColormap | CWBorderPixel | CWBackPixel, &attr);

    gc = XCreateGC (display, window, 0, NULL);
   XSetBackground(display, gc, 0L);