int Rled=7;
int Gled=6;
int Bled=4;

void setup() {
  pinMode (Rled,OUTPUT);
  pinMode (Gled,OUTPUT);
  pinMode (Bled,OUTPUT);

}

void loop() {
  digitalWrite (Rled,HIGH);
  delay (1000);
  digitalWrite (Rled,LOW);
  digitalWrite (Gled,HIGH);
  delay(1000);
  digitalWrite (Gled,LOW);
  digitalWrite (Bled,HIGH);
  delay(1000);
  digitalWrite (Bled,LOW);
  delay (1000);

}