#include <Wire.h>
const int led = 15;
const int button = 2;
int led_status = 0;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(led,OUTPUT);
  pinMode(button,INPUT);
  //digitalWrite(led,HIGH);
  Serial.println("all system go");

}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(button) == LOW){
    led_status = led_status+1;
    Serial.println(led_status);
    }
  if(led_status%2 == 1) {
    digitalWrite(led,LOW);
    }
  if(led_status%2 == 0) {
    digitalWrite(led,HIGH);
    }
    delay(10);
 

}