#include <stdlib.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/cursorfont.h>

int main(void) {
  Display *display;
  Window root;
  int screen;
  static char patbg[] = { 0x07, 0x0d, 0x0b, 0x0e };

  if (!(display = XOpenDisplay(getenv("DISPLAY")))) return 1;

  screen = DefaultScreen(display);
  root = RootWindow(display, screen);

  XDefineCursor(display, root,
  XCreateFontCursor(display, XC_X_cursor));
  XSetWindowBackgroundPixmap(display, root,
  XCreatePixmapFromBitmapData(display, root, patbg, 4, 4,
  BlackPixel(display, screen),
  WhitePixel(display, screen),
  DefaultDepth(display, screen)));
  XClearWindow(display, root);

  XCloseDisplay(display);

  return 0;
}