流水灯及数码管同时显示，通过key1控制流水灯款式切换，通过key2和key3分别控制数码管的加减10，key4为定时器开关控制，定时器控时数码管的跳动与否。-Water lights and digital pipe also shows that by controlling water lights style switched key1, key2 and key3 are controlled via digital plus and minus 10, key4 for the ti