int analogPin = 15, RELAY_PIN = 18;
int inputValue = 0, outputValue = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  
}

void loop() {
  // put your main code here, to run repeatedly:
  inputValue = analogRead(analogPin);
  Serial.print("input value : ");
  Serial.println(inputValue);

  outputValue = map(inputValue, 0, 1023, 0,255);
  Serial.print("Output Value : ");
  Serial.println(outputValue);
 
 //analogWrite(ledPin,outputValue);
 analogWrite(RELAY_PIN ,outputValue);
  delay(1000);
 // this speeds up the simulation
}