void setup() {
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
digitalWrite(2, HIGH);
}

void loop() {
//write '0'
digitalWrite(2, LOW);
digitalWrite(3,0);
digitalWrite(4,0);
digitalWrite(5,1);
digitalWrite(6,0);
digitalWrite(7,0);
digitalWrite(8,0);
digitalWrite(9,1);
delay(500);
//write '0'
digitalWrite(2,1);
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(6,1);
digitalWrite(7,1);
digitalWrite(8,1);
delay(500);

//write '1'
digitalWrite(3, LOW);
digitalWrite(4,0);
digitalWrite(5,0);
delay(500);
//write '1'
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,1);
delay(500);

//write '2'
digitalWrite(2, LOW);
digitalWrite(3,0);
digitalWrite(5,0);
digitalWrite(6,0);
digitalWrite(7,0);
digitalWrite(9,0);
delay(500);
//write '2'
digitalWrite(2,1);
digitalWrite(3,1);
digitalWrite(5,1);
digitalWrite(6,1);
digitalWrite(7,1);
digitalWrite(9,1);
delay(500);

//write '3'
digitalWrite(2,LOW);
digitalWrite(3,0);
digitalWrite(4,0);
digitalWrite(5,0);
digitalWrite(6,0);
digitalWrite(9,0);
delay(500);
//write '3'
digitalWrite(2,1);
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(6,1);
digitalWrite(9,1);
delay(500);

//write '4'
digitalWrite(3,LOW);
digitalWrite(4,0);
digitalWrite(5,0);
digitalWrite(8,0);
digitalWrite(9,0);
delay(500);
//write '4'
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(8,1);
digitalWrite(9,1);
delay(500);

//write '5'
digitalWrite(2,LOW);
digitalWrite(4,0);
digitalWrite(5,0);
digitalWrite(6,0);
digitalWrite(8,0);
digitalWrite(9,0);
delay(500);
//write '5'
digitalWrite(2,1);
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(6,1);
digitalWrite(8,1);
digitalWrite(9,1);
delay(500);

//write '6'
digitalWrite(2,LOW);
digitalWrite(4,0);
digitalWrite(5,0);
digitalWrite(6,0);
digitalWrite(7,0);
digitalWrite(8,0);
digitalWrite(9,0);
delay(500);
//write '6'
digitalWrite(2,1);
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(6,1);
digitalWrite(7,1);
digitalWrite(8,1);
digitalWrite(9,1);
delay(500);

//write '7'
digitalWrite(2,LOW);
digitalWrite(3,0);
digitalWrite(5,0);
digitalWrite(4,0);
delay(500);
//write '7'
digitalWrite(2,1);
digitalWrite(3,1);
digitalWrite(5,1);
digitalWrite(4,1);
delay(500);

//write '8'
digitalWrite(2,LOW);
digitalWrite(3,0);
digitalWrite(4,0);
digitalWrite(5,0);
digitalWrite(6,0);
digitalWrite(7,0);
digitalWrite(8,0);
digitalWrite(9,0);
delay(500);
//write '8'
digitalWrite(2,1);
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(6,1);
digitalWrite(7,1);
digitalWrite(8,1);
digitalWrite(9,1);
delay(500);

//write '9'
digitalWrite(2,LOW);
digitalWrite(3,0);
digitalWrite(4,0);
digitalWrite(5,0);
digitalWrite(6,0);
digitalWrite(8,0);
digitalWrite(9,0);
digitalWrite(2,1);
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(6,1);
digitalWrite(8,1);
digitalWrite(9,1);
delay(500);
}