int rouge = 23;
int vert = 22;
int seconde=1000;
void setup() {
  pinMode(rouge, OUTPUT);
  pinMode(vert, OUTPUT);
}
void loop() {
  digitalWrite(rouge, HIGH);
  delay(seconde);
  digitalWrite(rouge, LOW);
  delay(seconde);  
  
  digitalWrite(vert, HIGH);
  delay(seconde);
  digitalWrite(vert, LOW);
  delay(seconde);
}