bool ok = true; // Test to change this ti 0 (Zero) or 1 

void setup() {
  pinMode(0, OUTPUT); // Set pin '0' to OUTPUT mode
  pinMode(1, OUTPUT); // Set pin '1' to OUTPUT mode
}

void loop() {
  if (ok) {
    digitalWrite(0, HIGH); // Turn power on
    digitalWrite(1, LOW);  // Turn power off
  } else {
    digitalWrite(0, LOW);  // Turn power off
    digitalWrite(1, HIGH); // Turn power on
  }
  delay(1000);
  // What code is needed here to make green and red light blink alternately?
  // (Hint: One line related to the ok variable is enough) hint ok=!ok
}