const byte led=13;
int delayTime;
int pot;

void setup() {
  pinMode(led, OUTPUT);
}

void loop() {
  pot=analogRead(A0);
  delayTime=pot;
  if(delayTime<70) {
    delayTime=71;
  }
  digitalWrite(led, HIGH);
  delay(delayTime);
  digitalWrite(led, LOW);
  delay(delayTime);
}