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

Display *display;
int screen;
Window root, window;
XEvent event;

int main(int argc, char *argv[])
{
	display=XOpenDisplay(NULL);
	
	screen=DefaultScreen(display);
	root=DefaultRootWindow(display);
	
	/* create window and all related resources */
	window=XCreateWindow(display, root, 0, 0, 640, 480, 0,
		DefaultDepth(display, screen), InputOutput,
		DefaultVisual(display, screen), 
		0, NULL);
	

	while(1) {
	   XUnmapWindow(display, window);
	   XMapWindow(display, window);
	}
}