void setup() {
  // put your setup code here, to run once:
pinMode(2, OUTPUT );
pinMode(3, OUTPUT );
pinMode(4, OUTPUT );
pinMode(5, OUTPUT);
pinMode(6, INPUT);
Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(2, HIGH);
Serial.println("green is on");
delay(1000);
digitalWrite(2,LOW);
Serial.println("green is off");
digitalWrite(3, HIGH);
Serial.println("yellow  is on");
delay(1000);

digitalWrite(3, LOW);
Serial.println("yellow  is off ");
digitalWrite(4, HIGH);
Serial.println("blue  is on");
delay(1000);
digitalWrite(4, LOW);
Serial.println("blue  is off ");
delay(1000);
digitalWrite(5, HIGH );
Serial.println("red is on  ");
delay(1000);

digitalWrite(5, LOW);
Serial.println("red is off ");
delay(1000);
{
digitalWrite(3, HIGH);
digitalWrite(2, HIGH);
digitalWrite(3, LOW);
digitalWrite(4, HIGH);
digitalWrite(2, HIGH);
digitalWrite(4,LOW );
digitalRead(6)

}
}