#define segA 2//connecting segment A to PIN2

#define segB 3// connecting segment B to PIN3

#define segC 4// connecting segment C to PIN4

#define segD 5// connecting segment D to PIN5

#define segE 6// connecting segment E to PIN6

#define segF 7// connecting segment F to PIN7

#define segG 8// connecting segment G to PIN8

 

                int COUNT=0;//count integer for 0-9 increment

void setup()

{

                  for (int i=2;i<9;i++)

                  {

                                    pinMode(i, OUTPUT);// taking all pins from 2-8 as output

                  }

}

 

void loop()

{

switch (COUNT)

                {

 

                case 0://when count value is zero show”0” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, HIGH);

                digitalWrite(segF, HIGH);

                digitalWrite(segG, LOW);

                break;

 

                case 1:// when count value is 1 show”1” on disp

                digitalWrite(segA, LOW);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, LOW);

                digitalWrite(segE, LOW);

                digitalWrite(segF, LOW);

                digitalWrite(segG, LOW);

                break;

 

                case 2:// when count value is 2 show”2” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, LOW);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, HIGH);

                digitalWrite(segF, LOW);

                digitalWrite(segG, HIGH);

                break;

 

                case 3:// when count value is 3 show”3” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, LOW);

                digitalWrite(segF, LOW);

                digitalWrite(segG, HIGH);

                break;

 

                case 4:// when count value is 4 show”4” on disp

                digitalWrite(segA, LOW);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, LOW);

                digitalWrite(segE, LOW);

                digitalWrite(segF, HIGH);

                digitalWrite(segG, HIGH);

                break;

 

                case 5:// when count value is 5 show”5” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, LOW);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, LOW);

                digitalWrite(segF, HIGH);

                digitalWrite(segG, HIGH);

                break;

 

                case 6:// when count value is 6 show”6” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, LOW);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, HIGH);

                digitalWrite(segF, HIGH);

                digitalWrite(segG, HIGH);

                break;

 

                case 7:// when count value is 7 show”7” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, LOW);

                digitalWrite(segE, LOW);

                digitalWrite(segF, LOW);

                digitalWrite(segG, LOW);

                break;

 

                case 8:// when count value is 8 show”8” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, HIGH);

                digitalWrite(segF, HIGH);

                digitalWrite(segG, HIGH);

                break;

 

                case 9:// when count value is 9 show”9” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, LOW);

                digitalWrite(segF, HIGH);

                digitalWrite(segG, HIGH);

                break;

 

                break;

                }

                if (COUNT<10)

                {

                                COUNT++;

                                delay(1000);///increment count integer for every second

                }

                if (COUNT==10)

                {

                                COUNT=0;// if count integer value is equal to 10, reset it to zero.

                                delay(1000);

                }

}