按键按下（P6.0),P5.0输出高电平闪三下，按第二次键，P5.1输出高电平闪三下，按第三次键，P5.0、P5.1输出高电平同时闪三下，按第四次，关闭。接上LED或者霓虹灯管点亮有闪光灯的效果。-Button press (P6.0), P5.0 output high flash three times, according to the second key, P5.1 output high flash three times, according to the third key, P