Step 1: Step 1 Connection

Arduino Pin 2 to Pin 9

.Arduino Pin 3 to Pin 10

.Arduino Pin 4 to Pin 4.

Arduino Pin 5 to Pin 2.

. Arduino Pin 6 to Pin 1.

Arduino Pin 8 to Pin 7.

Arduino Pin 9 to Pin 6.

GND to Pin 3 and Pin 8 each connected with 220 ohm resistors.

Step 2: Step 2 Code

int a = 2;  //For displaying segment "a"

int b = 3;  //For displaying segment "b"

int c = 4;  //For displaying segment "c"

int d = 5;  //For displaying segment "d"

int e = 6;  //For displaying segment "e"

int f = 8;  //For displaying segment "f"

int g = 9;  //For displaying segment "g"
void setup() {               
  pinMode(a, OUTPUT);  //A
  pinMode(b, OUTPUT);  //B
  pinMode(c, OUTPUT);  //C
  pinMode(d, OUTPUT);  //D
  pinMode(e, OUTPUT);  //E
  pinMode(f, OUTPUT);  //F
  pinMode(g, OUTPUT);  //G
}
void displayDigit(int digit)
{
 //Conditions for displaying segment a
 if(digit!=1 && digit != 4)
 digitalWrite(a,HIGH);
 
 //Conditions for displaying segment b
 if(digit != 5 && digit != 6)
 digitalWrite(b,HIGH);
 
 //Conditions for displaying segment c
 if(digit !=2)
 digitalWrite(c,HIGH);
 
 //Conditions for displaying segment d
 if(digit != 1 && digit !=4 && digit !=7)
 digitalWrite(d,HIGH);
 
 //Conditions for displaying segment e 
 if(digit == 2 || digit ==6 || digit == 8 || digit==0)
 digitalWrite(e,HIGH);
 
 //Conditions for displaying segment f
 if(digit != 1 && digit !=2 && digit!=3 && digit !=7)
 digitalWrite(f,HIGH);
 if (digit!=0 && digit!=1 && digit !=7)
 digitalWrite(g,HIGH);
 
}
void turnOff()
{
  digitalWrite(a,LOW);
  digitalWrite(b,LOW);
  digitalWrite(c,LOW);
  digitalWrite(d,LOW);
  digitalWrite(e,LOW);
  digitalWrite(f,LOW);
  digitalWrite(g,LOW);
}
void loop() { for(int i=0;i<10;i++)
 {
   displayDigit(i);
   delay(1000);
   turnOff();
 }
}