#define YELLOW D7
#define WHITE D6
#define BLUE D5
#define RED D8
#define time 100
#define BUTTON D4

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(YELLOW, OUTPUT);
  pinMode(WHITE, OUTPUT);
  pinMode(BLUE, OUTPUT);
  pinMode(RED, OUTPUT);
  pinMode(BUTTON, INPUT_PULLDOWN);
  
}

// the loop function runs over and over again forever
void loop() {



if (digitalRead(BUTTON)==HIGH) {
  chase_4();
  //Made a separate function chase_4 to better organize
  //To set the condition: if pulldown is used, set the condition to high. if pullup is used, set it to low
}
else
{
      digitalWrite(YELLOW, LOW);  // turn the LED on (HIGH is the voltage level)
  digitalWrite(WHITE, LOW);   // turn the LED off by making the voltage LOW
  digitalWrite(BLUE, LOW);  // turn the LED on (HIGH is the voltage level)
  digitalWrite(RED, LOW);  // turn the LED on (HIGH is the voltage level)

}

}









// to run the leds as a ring
void chase_4()
{

    digitalWrite(YELLOW, HIGH);  // turn the LED on (HIGH is the voltage level)
  digitalWrite(WHITE, LOW);   // turn the LED off by making the voltage LOW
  digitalWrite(BLUE, LOW);  // turn the LED on (HIGH is the voltage level)
  digitalWrite(RED, LOW);  // turn the LED on (HIGH is the voltage level)
  delay(time); 

digitalWrite(YELLOW, LOW);  // turn the LED on (HIGH is the voltage level)
  digitalWrite(WHITE, HIGH);   // turn the LED off by making the voltage LOW
  digitalWrite(BLUE, LOW);  // turn the LED on (HIGH is the voltage level)
  digitalWrite(RED, LOW);  // turn the LED on (HIGH is the voltage level)
  delay(time); 
 
                     // wait for a second
  digitalWrite(WHITE, LOW);   // turn the LED off by making the voltage LOW
  digitalWrite(BLUE, HIGH);  // turn the LED on (HIGH is the voltage level)
   digitalWrite(YELLOW, LOW);  // turn the LED on (HIGH is the voltage level)
   digitalWrite(RED, LOW);  // turn the LED on (HIGH is the voltage level)
  delay(time);

  digitalWrite(WHITE, LOW);   // turn the LED off by making the voltage LOW
  digitalWrite(RED, HIGH);  // turn the LED on (HIGH is the voltage level)
  digitalWrite(BLUE, HIGH);  // turn the LED on (HIGH is the voltage level)
   digitalWrite(YELLOW, LOW);  // turn the LED on (HIGH is the voltage level)
   
  delay(time);  
}