const int sensorPin = 12; const int ledPin = 9; int sensorValue; int i; void setup() { pinMode(9, OUTPUT); pinMode(12, INPUT); for (i = 0; i < 1000; i++) { sensorValue = digitalRead(12); if (sensorValue==0) { digitalWrite(9, LOW); delay(5); } else { digitalWrite(9, HIGH); delay(5); } } } void loop() { }