int sensorValue; int led1 = 9, led2 = 10, led3 = 11; void setup() { Serial.begin(9600); pinMode (led1, OUTPUT); pinMode (led2, OUTPUT); pinMode (led3, OUTPUT); } void loop() { sensorValue = analogRead (A0); Serial.println(sensorValue); if (sensorValue < 300) { digitalWrite (led1, HIGH); digitalWrite (led2, LOW); digitalWrite (led3, LOW); } if (sensorValue >300 && sensorValue < 700) { digitalWrite (led1, LOW); digitalWrite (led2, HIGH); digitalWrite (led3, LOW); } if (sensorValue > 700) { digitalWrite (led1, LOW); digitalWrite (led2, LOW); digitalWrite (led3, HIGH); } }