int blue=4;
int red=6;
int green=7;
void setup() {
  pinMode(blue,OUTPUT);
  pinMode(red,OUTPUT);
   pinMode(green,OUTPUT);
  // put your setup code here, to run once:

}

void loop() {
  

   digitalWrite(blue,HIGH);
    digitalWrite(red,LOW);
   digitalWrite(green,LOW);
   delay(200);
   digitalWrite(blue,LOW);
   digitalWrite(red,HIGH);
   digitalWrite(green,LOW);
   delay(200);
      digitalWrite(blue,LOW);
   digitalWrite(red,LOW);
   digitalWrite(green,HIGH);
   delay(200);
  // put your main code here, to run repeatedly:

}