#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <X11/Xlib.h>

#define clock_width 8
#define clock_height 8
static unsigned char clock_bits[] = {
 0x3C, 0x5E, 0xEF, 0xF7, 0x87, 0xFF, 0x7E, 0x3C };

int main(int argc, char **argv)
{
	Display *dpy;
	int black, white;
	Window w;
	GC gc;
	Pixmap pm;

	dpy = XOpenDisplay(NULL);
	if (!dpy) {
		fprintf(stderr, "failed to open display\n");
		return EXIT_FAILURE;
	}

	black = BlackPixel(dpy, DefaultScreen(dpy));
	white = WhitePixel(dpy, DefaultScreen(dpy));

	w = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 0, 0, 128, 128, 0,
				black, black);
	gc = XCreateGC(dpy, w, 0, NULL);

	XSelectInput(dpy, w, StructureNotifyMask);
	XMapWindow(dpy, w);
	while (1) {
		XEvent e;
		XNextEvent(dpy, &e);
		if (e.type == MapNotify)
			break;
	}

	pm = XCreateBitmapFromData(dpy, w, (char *)clock_bits, clock_width,
				   clock_height);
	XSetForeground(dpy, gc, white);
	XSetBackground(dpy, gc, black);
	XCopyPlane(dpy, pm, w, gc, 0, 0, clock_width, clock_height, 0, 0, 1);
	XFlush(dpy);
	XFreePixmap(dpy, pm);

	sleep(5);

	XCloseDisplay(dpy);
	return EXIT_SUCCESS;
}