// Project Make a 4 bit binary counter with Arduino
// This will be made using BreadBoard along with Resistors and leds having other pin numbers like 2 ,3, 4 ,5 etc
int redLED =  13;
int redLED1 = 3;
int redLED2 = 4;
int redLED3 = 5;
void setup() {
  // put your setup code here, to run once:
  pinMode(redLED, OUTPUT);
  pinMode(redLED1, OUTPUT);
  pinMode(redLED2, OUTPUT);
  pinMode(redLED3, OUTPUT);
}
void loop() {
  
// put your main code here, to run repeatedly:

// For all of them are 0 //
  digitalWrite(redLED,  LOW);
  digitalWrite(redLED1, LOW);
  digitalWrite(redLED2, LOW);
  digitalWrite(redLED3, LOW);
  // For all of them are 1
  digitalWrite(redLED,  LOW);
  digitalWrite(redLED1, LOW);
  digitalWrite(redLED2, LOW);
  digitalWrite(redLED3, HIGH);
  delay(550);
  // For all of them are 2
  digitalWrite(redLED,  LOW);
  digitalWrite(redLED1, LOW);
  digitalWrite(redLED2, HIGH);
  digitalWrite(redLED3, LOW);
  delay(550);
  // For all of them are 3 //
  digitalWrite(redLED,  LOW);
  digitalWrite(redLED1, LOW);
  digitalWrite(redLED2, HIGH);
  digitalWrite(redLED3, HIGH);
  delay(550);
  // For all of them are 4
  digitalWrite(redLED,  LOW);
  digitalWrite(redLED1, HIGH);
  digitalWrite(redLED2, LOW);
  digitalWrite(redLED3, LOW);
  delay(550);
// And so on for all of others binary numbers upto 15//
}