Martin's mask

 #include <VarSpeedServo.h>;
int stateNow = 0;
int stateBefore = 0;
int i = 0;
int j = 0;
const int buttonPin = 13; //switch pour ouvre/ferme
const int servoPin = 9; //pin pour le servo
const int openval = 175; //degré douverture
const int closeval = 75 ; // degré de fermeture
const int left_eye=7; //pin pour lumiere oeil gauche
const int right_eye=6; // pin pour lumiere droite
const int closespeed=60; // vitesse de mouvement en fermeture sur 255
const int openspeed=255; //vitesse de mouvement en ouverture sur 255
long randON = 0;                  // Initialize a variable for the ON time
long randOff = 0;                 // Initialize a variable for the OFF time
VarSpeedServo servo;

void setup() {
  pinMode (buttonPin, INPUT);
  pinMode (left_eye, OUTPUT);
  pinMode (right_eye, OUTPUT);
  pinMode (servoPin, OUTPUT);
  servo.attach (servoPin,closeval,openval);
  servo.write(openval);
   randomSeed (analogRead (0));    // randomize
}

void loop() {
  stateNow = digitalRead(13);
  if (stateNow != stateBefore) {
    if (stateNow==HIGH and i==0) {
      servo.slowmove(closeval,closespeed);
      delay(1000);
      digitalWrite (left_eye, HIGH);
       randON = random (25, 200);    // generate ON time between 0.1 and 1.2 seconds
      delay(randON);
      digitalWrite (left_eye, LOW);
      randOff = random (25, 200);    // generate OFF time between 0.2 and 0.9 seconds
      delay(randOff);
      digitalWrite (right_eye, HIGH);
      randON = random (25, 200);    // generate ON time between 0.1 and 1.2 seconds
      delay(randON);
    digitalWrite (right_eye, LOW);
    randOff = random (25, 200);    // generate OFF time between 0.2 and 0.9 seconds
      delay(randOff);
    digitalWrite (left_eye, HIGH);
       randON = random (25, 200);    // generate ON time between 0.1 and 1.2 seconds
      delay(randON);
      digitalWrite (left_eye, LOW);
      randOff = random (25, 200);    // generate OFF time between 0.2 and 0.9 seconds
      delay(randOff);
      digitalWrite (right_eye, HIGH);
      randON = random (25, 200);    // generate ON time between 0.1 and 1.2 seconds
      delay(randON);
    digitalWrite (right_eye, LOW);
    randOff = random (50, 200);    // generate OFF time between 0.2 and 0.9 seconds
      delay(randOff);
      digitalWrite (right_eye, HIGH);
    digitalWrite (left_eye, HIGH);
    randON = random (75, 350);    // generate ON time between 0.1 and 1.2 seconds
      delay(randON);
    digitalWrite (right_eye, LOW);
    digitalWrite (left_eye, LOW);
    randOff = random (50, 350);    // generate OFF time between 0.2 and 0.9 seconds
      delay(randOff);
    digitalWrite (left_eye, HIGH);
    digitalWrite (right_eye, HIGH);
    randON = random (75, 350);    // generate ON time between 0.1 and 1.2 seconds
      delay(randON);
    digitalWrite (right_eye, LOW);
    digitalWrite (left_eye, LOW);
    randOff = random (50, 900);    // generate OFF time between 0.2 and 0.9 seconds
      delay(randOff);
    digitalWrite (left_eye, HIGH);
    digitalWrite (right_eye, HIGH);
      j=1;
    }
    else if (stateNow==LOW and j==1) {
      i=1;
    }
    else if (stateNow==HIGH and i==1) {
      digitalWrite (left_eye, LOW);
      digitalWrite (right_eye, LOW);
      servo.slowmove(openval,openspeed);
      j=0;
    }
    else if (stateNow==LOW and j==0) {
      i=0;
    }
  }
  stateBefore=stateNow;
}