const int PUSH_BTN_PIN = 8;
const int LED_GREEN_PIN = 2;
const int LED_RED_PIN = 3;
bool power_switch_status = false;
const int LED_GREEN_INTERVAL = 2000;
const int LED_RED_INTERVAL = 500;
int led_green_last_on_time = 0;
int led_red_last_on_time = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(PUSH_BTN_PIN, INPUT);
  pinMode(LED_GREEN_PIN, OUTPUT);
  pinMode(LED_RED_PIN, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  int btnStatus = digitalRead(PUSH_BTN_PIN);
  //Serial.println(btnStatus);
  delay(20);
  if(btnStatus == HIGH){
    power_switch_status = ! power_switch_status;
      delay(200);
  }

  digitalWrite(LED_GREEN_PIN, LOW);
  digitalWrite(LED_RED_PIN, LOW);
  if(power_switch_status == true) {    

    if(millis() - led_green_last_on_time >= LED_GREEN_INTERVAL){
      led_green_last_on_time += LED_GREEN_INTERVAL;
      digitalWrite(LED_GREEN_PIN, HIGH);
    }

    if(millis() - led_red_last_on_time >= LED_RED_INTERVAL){
      led_red_last_on_time += LED_RED_INTERVAL;
      digitalWrite(LED_RED_PIN, HIGH);
    }

  }

}