Free Hero Mesh

  SDL_Event ev;
  char buf[32];
  const UserCommand*uc;
  int i;
  set_cursor(XC_tcross);
  SDL_LockSurface(screen);
  draw_text(0,0,"Hello, World!",0xF0,0xFF);
  buf[16]=0;
  for(i=0;i<16;i++) {
    for(n=0;n<16;n++) buf[n]=(i<<4)+n?:255;
    draw_text(4,(i<<3)+12,buf,0xF0,0xF7);
  }
  n=0;
  SDL_UnlockSurface(screen);
  SDL_Flip(screen);
  while(SDL_WaitEvent(&ev)) switch(ev.type) {
    case SDL_KEYDOWN:
      switch(ev.key.keysym.sym) {
        case SDLK_BACKSPACE:
          n/=10;