matrix test

void setup() {
  // put your setup code here, to run once:
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT); 
  pinMode(A1, OUTPUT); 
  pinMode(A2, OUTPUT);

  digitalWrite(A1, LOW);
  digitalWrite(A2, LOW);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  //light(8);
  //delay(100);
  //light(4);
  //delay(500);
  light(5);
  delay(500);
  light(9);
  delay(500);
  light(10);
  delay(500);
  light(6);
  delay(500);
  
}

void light(byte input) {
  Serial.print("input: ");
  Serial.println(input);
  for(int i = 3; i >= 0; i--) {
    Serial.print(bitRead(input, i));
  }
  Serial.println("");
  
  if(bitRead(input, 3) == 1) {
    digitalWrite(12, HIGH);
  }
  else {
    digitalWrite(12, LOW);
  }
  delay(1);
  
  if(bitRead(input, 2) == 1) {
    digitalWrite(11, HIGH);
  }
  else {
    digitalWrite(11, LOW);
  }
  
  if(bitRead(input, 1) == 1) {
    digitalWrite(A1, HIGH);
  }
  else {
    digitalWrite(A1, LOW);
  }

  if(bitRead(input, 0) == 1) {
    digitalWrite(A2, HIGH);
  }
  else {
    digitalWrite(A2, LOW);
  }
}