const int analogInPin = A0;
int sensorValue = 0;
int timer = 0;
void setup() {
  // put your setup code here, to run once:
pinMode (12, OUTPUT);
pinMode(11, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
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);
digitalWrite(11, HIGH);
delay(timer);
digitalWrite (11 , LOW);
delay(timer);
digitalWrite(11, HIGH);
delay(timer);
digitalWrite (11 , LOW);
}