int df= 250;
int ds= 1000;
int blue = 22;
int rg []= {23,21};
void setup() {

  for(int i = 0; i < 2; i++)
  pinMode(rg[i], OUTPUT);
  pinMode(blue, OUTPUT);
}
void fast(){
  digitalWrite(rg[0], HIGH);
  delay(df);
  digitalWrite(rg[0], LOW);
  delay(df);
}
void fast2(){
  digitalWrite(rg[1], HIGH);
  delay(df);
  digitalWrite(rg[1], LOW);
  delay(df);
}
void slow(){
  digitalWrite(blue, HIGH);
  delay(ds);
  digitalWrite(blue, LOW);
  delay(ds);
}

void loop() {
for(int i = 0; i < 3; i++)
  fast();
for(int i = 0; i < 3; i++)
  slow();
for(int i = 0; i < 3; i++)
  fast2();
delay(2000);   
}