const int analogInPin = A0;
int sensorValue = 0;
int timer = 0;
void setup()
{
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
}

void loop() 
{
  sensorValue = analogRead(analogInPin);
  timer = map(sensorValue, 0, 1023, 10, 500);
  digitalWrite(12, HIGH);
  delay(timer);
  digitalWrite(12, LOW);
  delay(timer);
  digitalWrite(12, HIGH);
  delay(timer);
  digitalWrite(12, LOW);
  delay(timer);
  digitalWrite(11, HIGH);
  delay(timer);
  digitalWrite(11, LOW);
  delay(timer);
  digitalWrite(11, HIGH);
  delay(timer);
  digitalWrite(11, LOW);
  delay(timer);
}