void setup() {
  // put your setup code here, to run once:
pinMode(9, INPUT_PULLUP);
pinMode(8, INPUT_PULLUP);
pinMode(7, INPUT_PULLUP);}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(9, HIGH);
delay(100);
digitalWrite(9, LOW);
delay(100);
digitalWrite(8, HIGH);
delay(100);
digitalWrite(8, LOW);
delay(100);
digitalWrite(7, HIGH);
delay(100);
digitalWrite(7, LOW);
delay(100);




}