int led=3;
int led2=5;
int x;
int y;
void setup() {
pinMode(led, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(7, OUTPUT);
}
void loop() {
potentiometer(y);
LED_BLINK();
}

void potentiometer(int y){
  x = analogRead(A0);
  y = map(x,0,1023,0,255);
  if(y<80){
    digitalWrite(led, HIGH);
    digitalWrite(led2, LOW);
  }
  else{
    digitalWrite(led, LOW);
    digitalWrite(led2,HIGH);
    }
  }
  void LED_BLINK(){
  digitalWrite(led, HIGH);
  digitalWrite(led2, LOW);
  delay(2000);
  digitalWrite(led, LOW);
  digitalWrite(led2,HIGH);
  delay(2000);
  }