#include <JC_Button.h>

Button button( 9 );


void setup()
{
  Serial.begin( 115200 );
  pinMode( LED_BUILTIN, OUTPUT );
  digitalWrite( LED_BUILTIN, LOW );
  button.begin();
}


void loop()
{
  static uint32_t timer = 0;

  button.read();

  if ( button.wasReleased() )
  {
    if ( timer == 0 )
    {
      Serial.println( "timer started" );
      digitalWrite( LED_BUILTIN, HIGH );
    }
    else
    {
      Serial.println( "timer restarted" );
    }
    
    timer = millis();
  }

  if ( timer != 0 && millis() - timer >= 5000UL )
  {
    Serial.println( "timer finished" );
    digitalWrite( LED_BUILTIN, LOW );
    timer = 0;
  }
}