//변수 세팅 int r_led = 13; int y_led = 12; int g_led = 11; int button = 3; void setup() { pinMode(r_led, OUTPUT); pinMode(y_led, OUTPUT); pinMode(g_led, OUTPUT); pinMode(button, INPUT); } void loop() { //button이 HIGH일때 등화순서 3(빨간불) if(digitalRead(button) == HIGH){ digitalWrite(y_led, LOW); digitalWrite(r_led, HIGH); } else { //등화순서 2 (노란불) delay(5000); //5초대기 digitalWrite(r_led, LOW); digitalWrite(y..