//The simple use of interrupts
//it interferres in a current task that is on going 

void setup() {
  Serial.begin(9600);
  pinMode(2, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(2), my_isr, FALLING);
}

void loop() {
  //There is no code in this loop
  Serial.println("Hello from loop!");
  delay(1000);
}

void my_isr(){
  Serial.println("Hello from Interrupts");
  delay(1000);
}