void setup() {
pinMode(1,OUTPUT);
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
pinMode(6,OUTPUT);
pinMode(7,OUTPUT);
}

void loop() {
zero();
delay(1000);
one();
delay(1000);
two();
delay(1000);
three();
delay(1000);
four();
delay(1000);
five();
delay(1000);
six();
delay(1000);
seven();
delay(1000);
eight();
delay(1000);
nine();
delay(1000);
}

void zero(){
digitalWrite(1,LOW);
digitalWrite(2,LOW);
digitalWrite(3,LOW);
digitalWrite(4,LOW);
digitalWrite(5,LOW);
digitalWrite(6,LOW);
}

void one(){
digitalWrite(2,LOW);
digitalWrite(3,LOW);
}

void two(){
digitalWrite(1,LOW);
digitalWrite(2,LOW);
digitalWrite(7,LOW);
digitalWrite(5,LOW);
digitalWrite(4,LOW);
}

void three(){
digitalWrite(1,LOW);
digitalWrite(2,LOW);
digitalWrite(7,LOW);
digitalWrite(3,LOW);
digitalWrite(4,LOW);
}

void four(){
digitalWrite(6,LOW);
digitalWrite(7,LOW);
digitalWrite(2,LOW);
digitalWrite(3,LOW);
}

void five(){
digitalWrite(1,LOW);
digitalWrite(6,LOW);
digitalWrite(7,LOW);
digitalWrite(3,LOW);
digitalWrite(4,LOW);
}

void six(){
digitalWrite(7,LOW);
digitalWrite(3,LOW);
digitalWrite(4,LOW);
digitalWrite(5,LOW);
digitalWrite(6,LOW);
digitalWrite(1, LOW);
}

void seven(){
digitalWrite(1,LOW);
digitalWrite(2,LOW);
digitalWrite(3,LOW);
}

void eight(){
digitalWrite(1,LOW);
digitalWrite(2,LOW);
digitalWrite(3,LOW);
digitalWrite(4,LOW);
digitalWrite(5,LOW);
digitalWrite(6,LOW);
digitalWrite(7,LOW);
}

void nine(){
digitalWrite(7,LOW);
digitalWrite(6,LOW);
digitalWrite(1,LOW);
digitalWrite(2,LOW);
digitalWrite(3,LOW);
digitalWrite(4,LOW);
}