int q_1 = 4; int q_2 = 5; int q_3 = 6; int q_4 = 7; void setup() { Serial.begin(9600); pinMode(q_1, INPUT); pinMode(q_2, INPUT); pinMode(q_3, INPUT); pinMode(q_4, INPUT); } void loop() { int q1 = digitalRead(q_1); int q2 = digitalRead(q_2); int q3 = digitalRead(q_3); int q4 = digitalRead(q_4); if (q1 == HIGH && q2 == LOW && q3 == LOW && q4 == LOW) { digitalWrite(13,HIGH); } if (q1 == HIGH && q2 == HIGH && q3 == LOW && q4 == LOW) { digitalWrite(13,LOW); } delay(1000); }