#include <EEPROM.h>

void setup() {
  pinMode(2, OUTPUT);
  pinMode(3, INPUT);
  boolean LED=EEPROM.read(0);
  if (LED == 1)
    digitalWrite(2, HIGH);
}


void loop() {
  if(digitalRead(3) == HIGH){
    delay(20);
    boolean LED = EEPROM.read(0);
    if(LED == 1){
      digitalWrite(2, LOW);
      EEPROM.write(0,0);
    }
    else if(LED == 0){
      digitalWrite(2, HIGH);
      EEPROM.write(0,1);
    }
    while(digitalRead(3) == HIGH){}
    delay(20);
  }
}