const int buttonPin = 09;  // the number of the pushbutton pin
const int ledPin_1 = 02;   // the number of the LED pin 1
const int ledPin_2 = 05;    // the number of the LED pin 2
int buttonState = 0;       // variable for reading the pushbutton status
bool pressed = false;
void setup() {
  pinMode(ledPin_1, OUTPUT);  // initialize the LED pin1 as an output:
  pinMode(ledPin_2, OUTPUT);  // initialize the LED pin2 as an output:
  pinMode(buttonPin, INPUT);  // initialize the button pin as an input:
}
void loop() {
  buttonState = digitalRead(buttonPin);  // read the state of the pushbutton value:
  if (buttonState == HIGH)               // check if the pushbutton is pressed. If it is, the button state is HIGH:
  {
    if (pressed == false) {
      pressed = true;
      if (digitalRead(ledPin_1) == LOW)  // check whether the led1 is off, if it is then the LEDs will be HIGH
      {
        digitalWrite(ledPin_1, HIGH);
        digitalWrite(ledPin_2, HIGH);
        
      } 
      else {  // if led1 is on then it will turn off all the LEDs
        digitalWrite(ledPin_1, LOW);
        digitalWrite(ledPin_2, LOW);
      }
    }
  } else {
    pressed = false;
    delay(50);
  }
}