int red=2;
int yel=3;
int gr=4;
int red1=5;
int yel1=6;
int gr1=7;
int red2=8;
int yel2=9;
int gr2=10;
void setup() {
  // put your setup code here, to run once:

pinMode(red, OUTPUT);
pinMode(yel, OUTPUT);
pinMode(gr, OUTPUT);
pinMode(red1, OUTPUT);
pinMode(gr1, OUTPUT);
pinMode(yel1, OUTPUT);
pinMode(red2, OUTPUT);
pinMode(yel2, OUTPUT);
pinMode(gr2, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(red, HIGH);  //enables the 1st set of signals   (2,1) means it is on
digitalWrite(3, LOW);
digitalWrite(gr, LOW);
digitalWrite(red1, LOW);
digitalWrite(6, HIGH);
digitalWrite(gr1, LOW);
digitalWrite(red2, LOW);
digitalWrite(9, LOW);
digitalWrite(gr2, HIGH);
delay(5000);

digitalWrite(red, LOW);  //enables the 1st set of signals   (2,1) means it is on
digitalWrite(3, HIGH);
digitalWrite(gr, LOW);
digitalWrite(red1, LOW);
digitalWrite(6, LOW);
digitalWrite(gr1, HIGH);
digitalWrite(red2, HIGH);
digitalWrite(9, LOW);
digitalWrite(gr2, LOW);
delay(5000);

digitalWrite(red, LOW);  //enables the 1st set of signals   (2,1) means it is on
digitalWrite(3, LOW);
digitalWrite(gr, HIGH);
digitalWrite(red1, HIGH);
digitalWrite(6, LOW);
digitalWrite(gr1, LOW);
digitalWrite(red2, LOW);
digitalWrite(9, HIGH);
digitalWrite(gr2, LOW);
}