const int red1=2;
const int yellow1=3;
const int green1=4;

const int red2=5;
const int yellow2=6;
const int green2=7;

void setup() {
  // put your setup code here, to run once:
pinMode(red1, OUTPUT);
pinMode(yellow1, OUTPUT);
pinMode(green1, OUTPUT);

pinMode(red2, OUTPUT);
pinMode(yellow2, OUTPUT);
pinMode(green2, OUTPUT);
}
void loop() {
  // Direction1green, direction2red
  digitalWrite(green1, HIGH);
  digitalWrite(red2, HIGH);
  delay(5000);//green for 5 seconds

// Direction1yellow, direction2red
  digitalWrite(green1, LOW);
  digitalWrite(yellow1, HIGH);
  delay(2000);//yellow for 2 seconds

// Direction1red, direction2red
  digitalWrite(yellow1, LOW);
  digitalWrite(red1, HIGH);
  delay(1000);//all red  for 1 seconds
// Direction1red, direction2green
  digitalWrite(red2, LOW);
  digitalWrite(green2, HIGH);
  delay(5000);//green for 5 seconds
// Direction1red, direction2yellow
  digitalWrite(green2, LOW);
  digitalWrite(yellow2, HIGH);
  delay(2000);//yellow for 2 seconds
// Direction1red, direction2red
  digitalWrite(yellow2, LOW);
  digitalWrite(red2, HIGH);
  delay(1000);//all red for 1 seconds
// Direction1red off, reset for next cycle
 digitalWrite(red1,LOW);
  digitalWrite(red2, LOW);
}