int LEDstate=LOW; // HIGH
long int changedTime =0; long int interval=5000;
long int changedTime2 =0; long int interval2=7000;
void setup() {
  pinMode(13, OUTPUT);pinMode(11, OUTPUT);
  Serial.begin(9600);
  digitalWrite(13,LEDstate);
}
void loop() {
  long int now=millis(); // time in ms
  //time based tast1 - timer1
  if(now-changedTime>=interval){
    if (LEDstate==LOW) LEDstate=HIGH;
    else LEDstate=LOW;
    digitalWrite(13,LEDstate);
    changedTime=now;
    Serial.println("LED state changed");
  }
    //time based tast2 - timer1
  if(now-changedTime2>=interval2){
    changedTime2=now;
    tone(11,600); delay(500); noTone(11);
    Serial.println("Tone");
  }
  //Continous task
  Serial.println(analogRead(A2));
  delay(100);
}