/*
  CTC GO! CORE MODULE
  LESSON 04 - Digital Inputs & Outputs

  This sketch is written to accompany Activity 3 in Lesson 04 of the CTC GO! core module
*/

// Initialising the pins and other variables.
int greenLED = 13;
int redLED = 12;
int yellowLED = 11;
int dt = 250;
int button_pin = 2;
int button_state =0;

int blinkingLED = 0;

void setup()
{
  // Setting up the pins as OUTPUTS.
  pinMode(greenLED, OUTPUT);
  pinMode(yellowLED, OUTPUT);
  pinMode(redLED, OUTPUT);
  pinMode(button_pin, INPUT);
}

void loop()
{
  // Randomly blink the LEDs
 /*blinkingLED = random(11, 14);

  if (blinkingLED == greenLED)
  {
    digitalWrite(greenLED, HIGH);
  }
  else if (blinkingLED == yellowLED)
  {
    digitalWrite(yellowLED, HIGH);
  }
  else if (blinkingLED == redLED)
  {
    digitalWrite(redLED, HIGH);
  }*/
  //Note: all above lines could be replaced by
  if (button_state == LOW) {
  
    digitalWrite(random(11, 14), HIGH);
  }

  else if (button_state == HIGH) {

  delay(dt);
  digitalWrite(greenLED, LOW);
  digitalWrite(yellowLED, LOW);
  digitalWrite(redLED, LOW);
  delay(dt);
}
 
 

  
  delay (dt);
  digitalWrite(greenLED, LOW);
  digitalWrite(yellowLED, LOW);
  digitalWrite(redLED, LOW);
  delay(dt);
}