void setup() {
  // put your setup code here, to run once:
pinMode(8,OUTPUT);//red
pinMode(7,OUTPUT);//blue
pinMode(6,OUTPUT);//green
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(8,LOW);
delay(1000);
digitalWrite(8,HIGH);
delay(2000);
digitalWrite(7,LOW);
delay(1000);
digitalWrite(7,HIGH);
delay(2000);
digitalWrite(6,LOW);
delay(1000);
digitalWrite(6,HIGH);
delay(2000);
//delay(2000);

}