int red_led = 6;
int green_led = 7;
int left_sensor = 3;
int right_sensor = 4;
int val_left = 0;
int val_right = 0;
int state = LOW;

void setup() {
  // put your setup code here, to run once:
  pinMode(red_led, OUTPUT);
  pinMode(green_led, OUTPUT);
  pinMode(left_sensor, INPUT);
  pinMode(right_sensor, INPUT);


}

void loop() {
  // put your main code here, to run repeatedly:

  //left sensor
  val_left = digitalRead(left_sensor); //read left sensor value
  //check if theres movement by the left-hand sensor
  if (val_left == HIGH){
    digitalWrite(green_led, HIGH); //turn on green LED if there is movement
    delay(100); //delay for 100 milliseconds

    if(state == LOW){
      state = HIGH;
    }
  }

  else{
    digitalWrite(green_led, LOW); //turn off green LED
    delay(200); //delay for 200 milliseconds

    if (state == HIGH){
      state = LOW;
    }
  }

  //Right Sensor
  val_right = digitalRead(right_sensor); //read right sensor value
  //check if there's movement by the right sensor
  if (val_right == HIGH){
    digitalWrite(red_led, HIGH); //turn on red LED if there is movement
    delay(100);

    if(state == LOW){
      state = HIGH;
    }
  }

  else{
    digitalWrite(red_led, LOW); //turn off red LED
    delay(200); //delay for 200 milliseconds

    if (state == HIGH){
      state = LOW;
    }
  }

}