单片机P1端口的8个LED作左移右移，不断循环。当按外部中断INT0开关K1时，循环停止，转而使8个LED闪烁4次。之后，又恢复灯的左右移循环。-Singlechip P1 port 8 LED for the left shifted to right, and constantly cycle. When by external interrupt INT0 switch K1, the cycle of stop and turn to make eight LED flashes 4 times. After the restoration of lights around the cycle changed.