/* attiny85 2 led aleatoire millis

   allumage et extinction aleatoires de 2 LED
   simulation: https://wokwi.com/projects/441719606440813569

                 ATtiny85

               =|1  U  8|= VCC
             3 =|2     7|= 2
  random -->A2 =|3     6|= 1--> Led2
           GND =|4     5|= 0--> Led1
*/

const byte Led1 = 0;
const byte Led2 = 1;
bool led1State;
bool led2State;
unsigned long led1PreviousMillis = 0;
unsigned long led2PreviousMillis = 0;
unsigned int led1Interval = 0;
unsigned int led2Interval = 0;

void setup() {
  pinMode(Led1, OUTPUT);
  pinMode(Led2, OUTPUT);
  randomSeed(analogRead(A2));
} // fin setup

void loop() {
  unsigned long currentMillis = millis();
  if (currentMillis - led1PreviousMillis >= led1Interval) {
    led1PreviousMillis = currentMillis;
    led1State = !led1State;
    led1Interval = 1000 * random(20,60);
    digitalWrite(Led1, led1State);
  }
  if (currentMillis - led2PreviousMillis >= led2Interval) {
    led2PreviousMillis = currentMillis;
    led2State = !led2State;
    led2Interval = 1000 * random(20,60);
    digitalWrite(Led2, led2State);
  }  
} // fin loop