#include <TM1637TinyDisplay.h> ;
#define CLK 2
#define DIO 3
int r = 13 ;
int y = 12;
int g = 11;
int c = 1;
int timerandom = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(r, OUTPUT);
  pinMode(y, OUTPUT);
  pinMode(g, OUTPUT);
}

void loop() {
  if (c == 1) {
    digitalWrite(r, HIGH);
    digitalWrite(y, LOW);
    digitalWrite(g, LOW);
    delay(250);
  }
  if (c == 2) {
    digitalWrite(r, LOW);
    digitalWrite(y, HIGH);
    digitalWrite(g, LOW);
    delay(250);
  }
  if (c == 3) {
    digitalWrite(r, LOW);
    digitalWrite(y, LOW);
    digitalWrite(g, HIGH);
    delay(250);
  }
  if (c == 1) {
    timerandom = random(30,80);
    while (timerandom > 0) {
      delay(250);
      timerandom = timerandom - 1;
      if (timerandom == 0) {
        c = 3;
        digitalWrite(r, LOW);
        digitalWrite(y, LOW);
        digitalWrite(g, HIGH);
      }
    }
  }
  if (c == 3) {
    timerandom = random(20,70);
    while (timerandom > 0) {
      delay(250);
      timerandom = timerandom - 1;
      if (timerandom == 3) {
        c = 2;
        digitalWrite(r, LOW);
        digitalWrite(y, HIGH);
        digitalWrite(g, LOW);
      }
      if (timerandom == 2) {
        c = 2;
        digitalWrite(r, LOW);
        digitalWrite(y, HIGH);
        digitalWrite(g, LOW);
      }
      if (timerandom == 1) {
        c = 2;
        digitalWrite(r, LOW);
        digitalWrite(y, HIGH);
        digitalWrite(g, LOW);
      }
      if (timerandom == 0) {
        c = 1;
        digitalWrite(r, HIGH);
        digitalWrite(y, LOW);
        digitalWrite(g, LOW);
      }
    } 
  }
}