void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(26, OUTPUT);
  pinMode(4, INPUT);
  pinMode(14, OUTPUT);

}

void loop() {
  int v=analogRead(4);
  Serial.println(v);
  int intensity=map(v,0,4095,0,255);
  Serial.println(intensity);
  analogWrite(14,intensity);
  if(intensity>=130){
    digitalWrite(26, HIGH);
  }
  else{
    digitalWrite(26, LOW);
  }
}