int button = 3; 
int led = 7;
boolean on=false;
int buttonState = 0;

void setup() {
  
  pinMode(led, OUTPUT);
  pinMode(button, INPUT);
}

void loop() {
  buttonState = digitalRead(button);
  if (buttonState == HIGH) {
    if(on==true){
      on=false;
    } else {
      on=true;
    }
  }
  if ( on == true)  {
    digitalWrite(led, LOW); // LED on // 
delay (50);
digitalWrite(led, HIGH); // LED on // 
delay (60);
digitalWrite(led, LOW); // LED on // 
delay (15);
digitalWrite(led, HIGH); // LED on // 
delay (60);
digitalWrite(led, LOW); // LED on // 
delay (15);
digitalWrite(led, HIGH); // LED on // 
delay (60);
digitalWrite(led, LOW); // LED on // 
delay (100);
digitalWrite(led, HIGH); // LED on // 
delay (100);
digitalWrite(led, LOW); // LED on // 
delay (20);
digitalWrite(led, HIGH); // LED on // 
delay (100);
digitalWrite(led, LOW); // LED on // 
delay (20);
digitalWrite(led, HIGH); // LED on // 
delay (100);
digitalWrite(led, LOW); // LED on // 
delay (50);
digitalWrite(led, HIGH); // LED on // 
delay (60);
digitalWrite(led, LOW); // LED on // 
delay (15);
digitalWrite(led, HIGH); // LED on // 
delay (60);
digitalWrite(led, LOW); // LED on // 
delay (15);
digitalWrite(led, HIGH); // LED on // 
delay (60);
  }
    else{

  digitalWrite(led, LOW); // LED of //

   

  }

}