//http://arduino.cc/en/Tutorial/AnalogInput



int sensorPin = A0;   // select the input pin for the potentiometer
int ledPin1 = 13;      // select the pin for the LED
int ledPin2 = 12;      // select the pin for the LED
int sensorValue = 0;  // variable to store the value coming from the sensor

void setup() {
  // declare the ledPin as an OUTPUT:
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
}

void loop() {
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin);
  // turn the ledPin on
  digitalWrite(ledPin1, HIGH);
  digitalWrite(ledPin2, LOW);
  // stop the program for <sensorValue> milliseconds:
  delay(sensorValue);
  // turn the ledPin off:
  digitalWrite(ledPin1, LOW);
  digitalWrite(ledPin2, HIGH);
  // stop the program for for <sensorValue> milliseconds:
  delay(sensorValue);
}