int RBL = 0; // select the input pin for the potentiometer int LBL = 0; void setup() { Serial.begin(9600); pinMode(2, OUTPUT); pinMode(3,OUTPUT); pinMode(7, OUTPUT); pinMode(8,OUTPUT); } void loop() { analogWrite(5,100); analogWrite(6,100); RBL = analogRead(A0); LBL = analogRead(A1); // Serial.println(RBL); // delay(1000); // Serial.println(LBL); // delay(1000); if ( RBL<750 && LBL<700) { digitalWrite(2, HIGH); digitalWrite(3, LOW); digitalWrite(7, HIGH); digitalWrite(8, LOW); } else { digitalWrite(2, LOW); digitalWrite(3, LOW); digitalWrite(7, LOW); digitalWrite(8, LOW); delay(100); digitalWrite(2, LOW); digitalWrite(3, HIGH); digitalWrite(7, LOW); digitalWrite(8, HIGH); delay(100); digitalWrite(2, HIGH); digitalWrite(3, LOW); digitalWrite(7, LOW); digitalWrite(8, HIGH); delay(500); } }