const int A_rled = 2;
const int A_yled = 3;
const int A_gled = 4;
const int B_rled = 5;
const int B_yled = 6;
const int B_gled = 7;
const int C_rled = 8;
const int C_yled = 9;
const int C_gled = 10;
const int D_rled = 11;
const int D_yled = 12;
const int D_gled = 13;
void setup() {
  // put your setup code here, to run once:
  pinMode(A_rled, OUTPUT);
  pinMode(A_yled, OUTPUT);
  pinMode(A_gled, OUTPUT);
  pinMode(B_rled, OUTPUT);
  pinMode(B_yled, OUTPUT);
  pinMode(B_gled, OUTPUT);
  pinMode(C_rled, OUTPUT);
  pinMode(C_yled, OUTPUT);
  pinMode(C_gled,OUTPUT);
  pinMode(D_rled, OUTPUT);
  pinMode(D_yled, OUTPUT);
  pinMode(D_gled, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
 digitalWrite(A_gled, HIGH);
 digitalWrite(B_yled, HIGH);
 digitalWrite(C_rled, HIGH);
 digitalWrite(D_rled, HIGH);
 digitalWrite(A_yled,  0);
 digitalWrite(B_rled, 0);
 digitalWrite(C_rled, HIGH);
 digitalWrite(D_gled, 0);
 delay(5000);
 digitalWrite(A_rled, HIGH);
 digitalWrite(B_gled, HIGH);
 digitalWrite(C_yled, HIGH);
 digitalWrite(D_rled, HIGH);
 digitalWrite(A_gled, 0);
 digitalWrite(B_yled, 0);
 digitalWrite(C_rled, 0);
 digitalWrite(D_rled, HIGH);
 delay(5000);
 digitalWrite(A_rled, HIGH);
 digitalWrite(B_rled, HIGH);
 digitalWrite(C_gled, HIGH);
 digitalWrite(D_yled, HIGH);
 digitalWrite(A_rled, 1);
 digitalWrite(B_gled, 0);
 digitalWrite(C_yled, 0);
 digitalWrite(D_rled, 0);
  delay(5000);
 digitalWrite(A_yled,  HIGH);
 digitalWrite(B_rled, HIGH);
 digitalWrite(C_rled, HIGH);
 digitalWrite(D_gled, HIGH);
 digitalWrite(A_rled, 0);
 digitalWrite(B_rled, 1);
 digitalWrite(C_gled, 0);
 digitalWrite(D_yled, 0);
  delay(5000);



}