int pin1 = 23;
int pin2 = 22;
int pin3 = 21;
int pin4 = 19;
int pin5 = 18;
int pin6 = 5;
int pin7 = 17;

void setup() {
pinMode(pin1, OUTPUT);
pinMode(pin2, OUTPUT);
pinMode(pin3, OUTPUT);
pinMode(pin4, OUTPUT);
pinMode(pin5, OUTPUT);
pinMode(pin6, OUTPUT);
pinMode(pin7, OUTPUT);
 
}

void loop() {
digitalWrite(pin1, HIGH);
digitalWrite(pin2, LOW);
digitalWrite(pin3, LOW);
digitalWrite(pin4, LOW);
digitalWrite(pin5, LOW);
digitalWrite(pin6, LOW);
digitalWrite(pin7, LOW);
delay(1000);

digitalWrite(pin1, LOW);
digitalWrite(pin2, HIGH);
digitalWrite(pin3, LOW);
digitalWrite(pin4, LOW);
digitalWrite(pin5, LOW);
digitalWrite(pin6, LOW);
digitalWrite(pin7, LOW);
delay(1000);

digitalWrite(pin1, LOW);
digitalWrite(pin2, LOW);
digitalWrite(pin3, HIGH);
digitalWrite(pin4, LOW);
digitalWrite(pin5, LOW);
digitalWrite(pin6, LOW);
digitalWrite(pin7, LOW);
delay(1000);

digitalWrite(pin1, LOW);
digitalWrite(pin2, LOW);
digitalWrite(pin3, LOW);
digitalWrite(pin4, HIGH);
digitalWrite(pin5, LOW);
digitalWrite(pin6, LOW);
digitalWrite(pin7, LOW);
delay(1000);

digitalWrite(pin1, LOW);
digitalWrite(pin2, LOW);
digitalWrite(pin3, LOW);
digitalWrite(pin4, LOW);
digitalWrite(pin5, HIGH);
digitalWrite(pin6, LOW);
digitalWrite(pin7, LOW);
delay(1000);

digitalWrite(pin1, LOW);
digitalWrite(pin2, LOW);
digitalWrite(pin3, LOW);
digitalWrite(pin4, LOW);
digitalWrite(pin5, LOW);
digitalWrite(pin6, HIGH);
digitalWrite(pin7, LOW);
delay(1000);

digitalWrite(pin1, LOW);
digitalWrite(pin2, LOW);
digitalWrite(pin3, LOW);
digitalWrite(pin4, LOW);
digitalWrite(pin5, LOW);
digitalWrite(pin6, LOW);
digitalWrite(pin7, HIGH);
delay(1000);
}