#include <SoftwareSerial.h>
SoftwareSerial mySerial(1,2);

int value = 0;

void setup() {
  mySerial.begin(9600);
  pinMode(0, OUTPUT);
}

void loop() {
  value = analogRead (3);
  value = map(value, 0, 1023, 0, 255);
  mySerial.println(value);
  delay(100);

  if(value >= 250 && value <= 255)
  {
  digitalWrite(0, HIGH);  
  }
  else
  {
  digitalWrite(0, LOW); 
  }
}