const int blueB = 2; //button connected to pin 2
const int yellowB = 3; //button connected to pin 3
volatile int pintOne; 
volatile int pintTwo;

void setup() {
  attachInterrupt(digitalPinToInterrupt(blueB), handlerOne, CHANGE);
  attachInterrupt(digitalPinToInterrupt(yellowB), handlerTwo, CHANGE);
  pinMode(blueB, LOW);
  pinMode(yellowB, LOW);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
}

void loop() {
  digitalWrite(8, pintOne);
  digitalWrite(9, pintTwo);
}

void handlerOne() {
  pintOne = digitalRead(blueB);
}

void handlerTwo() {
  pintTwo = digitalRead(yellowB);
}