int red=13;
int green = 12;
int blue = 11;
void setup() {
  // put your setup code here, to run once:
pinMode(13, OUTPUT);
pinMode(12, OUTPUT); 
pinMode(11, OUTPUT);
pinMode(A1, INPUT);
}

void loop() {
  
digitalWrite(red, LOW);
digitalWrite(blue , LOW);
digitalWrite(green, LOW);
delay(1000);
digitalWrite(red, HIGH);
digitalWrite(blue , LOW);
digitalWrite(green, LOW);
delay(1000);
digitalWrite(red, LOW);
digitalWrite(blue , HIGH);
digitalWrite(green, LOW);
delay(1000);
digitalWrite(red, LOW);
digitalWrite(blue , LOW);
digitalWrite(green, HIGH);
delay(1000);
digitalWrite(red, HIGH);
digitalWrite(blue , HIGH);
digitalWrite(green, LOW);
delay(1000);
digitalWrite(red, LOW);
digitalWrite(blue , HIGH);
digitalWrite(green, HIGH);
delay(1000);
digitalWrite(red, HIGH);
digitalWrite(blue , LOW);
digitalWrite(green, HIGH);

}}