const int red1=25,yellow1=26,green1=27,red2=19,yellow2=18,green2=16;
void setup() {
  Serial.begin(115200);
 pinMode(red1,OUTPUT);
 pinMode(yellow1,OUTPUT);
 pinMode(green1,OUTPUT);
 pinMode(red2,OUTPUT);
 pinMode(yellow2,OUTPUT);
 pinMode(green2,OUTPUT);
  
}

void loop() {
  digitalWrite(red1,HIGH);
  digitalWrite(green2,HIGH);

  delay(100);
  digitalWrite(yellow1,LOW);  
  digitalWrite(yellow2,LOW);
  digitalWrite(green1,LOW);
  digitalWrite(red2,LOW); 
  delay(2000);
  digitalWrite(yellow1,HIGH);
  digitalWrite(yellow2,HIGH);
  delay(100);
  digitalWrite(red1,LOW);
  digitalWrite(green2,LOW);
  digitalWrite(green1,LOW);
  digitalWrite(red2,LOW);
  delay(2000);
  digitalWrite(green1,HIGH);
  digitalWrite(red2,HIGH);
  delay(100);
  digitalWrite(red1,LOW);
  digitalWrite(green2,LOW);
  digitalWrite(yellow1,LOW);
  digitalWrite(yellow2,LOW);
  delay(2000);
  digitalWrite(yellow1,HIGH);
  digitalWrite(yellow2,HIGH);
  delay(100);
  digitalWrite(red1,LOW);
  digitalWrite(green2,LOW);
  digitalWrite(green1,LOW);
  digitalWrite(red2,LOW);
  delay(2000);

}