Change effect works in setup() only

[ghost]

I read other similar questions like this and this.
I'm testing this code on an Arduino Leonardo:

#include <jled.h>

JLed leds[] = 
{
  JLed(9).Off(),
  JLed(10).Off()
};
JLedSequence sequence(JLedSequence::eMode::PARALLEL, leds);

void ProcessLine(char *line)
{
  leds[1].Blink(100, 10).MaxBrightness(255).Forever(); // this not works
  Serial.print("done"); // this is printed
}

void setup()
{
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);

  Serial.begin(115200);
  while (!Serial);
  Serial.setTimeout(10);

  //leds[1].Blink(100, 10).MaxBrightness(255).Forever(); // this works
}

void loop()
{
  static char inBuf[64];

  if (Serial.available())
  {
    size_t size = Serial.readBytes(inBuf, 64);
    inBuf[size] = '\0';
    ProcessLine(inBuf);
  }
 
  sequence.Update();
  delay(1);
}

I'm expecting it begins blinking whenever it receives something on the serial line. The "done" message is printed out. But the LED remains off.
Instead, if I uncomment the line in setup() it begins blinking after the serial port is open.

Where is my mistake here?

[ghost]

Even if the second issue I linked above is very similar to my question, apparently I solved removing the sequence.

[jandelgado]

The JLedSequence sequence object has a state and in your setup, the sequence is in state "not running", because both JLed objects are already/initially Off. So further calls to sequence.Update() will have no effect. Try to call sequence.Reset() in your ProcessLine function.

Also the pinMode and digitalWrite calls are not needed, since already handled by JLed

[ghost]

Great thanks. Is there any advantage to use a parallel sequence instead of handling both JLed objects separately (i.e. calling .Update() for each one) ?

[jandelgado]

No, the JLedSequence is just for convenience if you have e.g. 10 LEDs to update