int lane1R = 13;
int lane1Y = 12;
int lane1G = 10;

int lane2R = 7;
int lane2Y = 6;
int lane2G = 9;

int lane3R = 4;
int lane3Y = 3;
int lane3G = 2;

void setup() {
  pinMode(lane1R, OUTPUT);
  pinMode(lane1Y, OUTPUT);
  pinMode(lane1G, OUTPUT);

  pinMode(lane2R, OUTPUT);
  pinMode(lane2Y, OUTPUT);
  pinMode(lane2G, OUTPUT);

  pinMode(lane3R, OUTPUT);
  pinMode(lane3Y, OUTPUT);
  pinMode(lane3G, OUTPUT);


}

void loop() {
 digitalWrite(lane1G, HIGH);
 digitalWrite(lane2G, LOW);
 digitalWrite(lane3G, LOW);
 digitalWrite(lane1Y, LOW);
 digitalWrite(lane2Y, LOW);
 digitalWrite(lane3Y, LOW);
 digitalWrite(lane1R, LOW);
 digitalWrite(lane2R, HIGH);
 digitalWrite(lane3R, HIGH);

 delay(5000);

 digitalWrite(lane1Y, LOW);
 digitalWrite(lane2Y, HIGH);
 digitalWrite(lane3Y, LOW);
 delay(2000);

 digitalWrite(lane1G,LOW);
 digitalWrite(lane2G, HIGH);
 digitalWrite(lane3G, LOW);
 digitalWrite(lane1Y, LOW);
 digitalWrite(lane2Y, LOW);
 digitalWrite(lane3Y, LOW);
 digitalWrite(lane1R, HIGH);
 digitalWrite(lane2R, LOW);
 digitalWrite(lane3R, HIGH);
 delay(5000);

 digitalWrite(lane1Y, LOW);
 digitalWrite(lane2Y, LOW);
 digitalWrite(lane3Y, HIGH);
 delay(2000);

 digitalWrite(lane1G, LOW);
 digitalWrite(lane2G, LOW);
 digitalWrite(lane3G, HIGH);
 digitalWrite(lane1Y, LOW);
 digitalWrite(lane2Y, LOW);
 digitalWrite(lane3Y, LOW);
 digitalWrite(lane1R, HIGH);
 digitalWrite(lane2R, HIGH);
 digitalWrite(lane3R, LOW);
 delay(5000);

 digitalWrite(lane1Y, HIGH);
 digitalWrite(lane2Y, LOW);
 digitalWrite(lane3Y, LOW);
 delay(2000);
}