beep 音乐

  windows.beep(523,500);         //1
  windows.beep(587,500);         //2
  windows.beep(659,500);           //3
  windows.beep(698,500);             //   4
  windows.beep(784,500);             //   5
  windows.beep(880,500);               //   6
  windows.beep(998,500);               //   7
  windows.beep(1047,500);
  windows.beep(998,500);
  windows.beep(880,500);
  windows.beep(784,500);
  windows.beep(698,500);
  windows.beep(659,500);
  windows.beep(587,500);
  windows.beep(523,500);