#define ledb 5
#define ledvd 4
#define ledam 3
#define ledvmo 2
 void setup() {

  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);

}

void loop() {

  digitalWrite(ledvd, HIGH);
  digitalWrite(ledam, LOW);
  digitalWrite(ledvmo, LOW);
  delay(3000);
  digitalWrite(ledam, HIGH);
  digitalWrite(ledvd, LOW);
  digitalWrite(ledvmo, LOW);
  delay(3000);
  digitalWrite(ledvmo, HIGH);
  digitalWrite(ledvd, LOW);
  digitalWrite(ledam, LOW);
  delay(3000);
}