#define led 4
#define button 2 
int button1;
boolean i=0;
void setup() {
  Serial.begin(115200);
  pinMode(led,OUTPUT);
  pinMode(button,INPUT);
  delay(400);
}
void loop() {
  button1=digitalRead(button);
  Serial.println(button1);
  if (button1==1){
    i=!i;
    delay(500);
  }
  if(i==1){
    digitalWrite(led , HIGH);
  }
  else
  digitalWrite(led,LOW);
}