void setup()
{
pinMode(22,OUTPUT); //pin0-a led
pinMode(23,OUTPUT); //pin1-b led
pinMode(2,OUTPUT); //pin2-c led
pinMode(4,OUTPUT); //pin3-d led
pinMode(18,OUTPUT); //pin4-e led
pinMode(21,OUTPUT); //pin5-f led
pinMode(19,OUTPUT); //pin6-g led
pinMode(13,OUTPUT); //pin7-dp led
}
void loop()
{

digitalWrite(22, LOW); // a-led OFF
digitalWrite(23, LOW); // b-led ON
digitalWrite(2, LOW); // c-led ON
digitalWrite(4, LOW); // d-led OFF
digitalWrite(18, LOW); // e-led OFF
digitalWrite(21, LOW); // f-led OFF
digitalWrite(19,HIGH ); // g-led OFF
digitalWrite(13, HIGH); // dp-led ON
delay(1000); //1sec delay

digitalWrite(22, HIGH); // a-led OFF
digitalWrite(23, LOW); // b-led ON
digitalWrite(2, LOW); // c-led ON
digitalWrite(4, HIGH); // d-led OFF
digitalWrite(18, HIGH); // e-led OFF
digitalWrite(21, HIGH); // f-led OFF
digitalWrite(19,HIGH ); // g-led OFF
digitalWrite(13, HIGH); // dp-led ON
delay(1000); //1sec delay

digitalWrite(22, HIGH); // a-led OFF
digitalWrite(23, LOW); // b-led ON
digitalWrite(2, LOW); // c-led ON
digitalWrite(4, HIGH); // d-led OFF
digitalWrite(18, HIGH); // e-led OFF
digitalWrite(21, HIGH); // f-led OFF
digitalWrite(19,HIGH ); // g-led OFF
digitalWrite(13, HIGH); // dp-led ON
delay(1000); //1sec delay

digitalWrite(22, HIGH); // a-led OFF
digitalWrite(23, LOW); // b-led ON
digitalWrite(2, LOW); // c-led ON
digitalWrite(4, HIGH); // d-led OFF
digitalWrite(18, HIGH); // e-led OFF
digitalWrite(21, HIGH); // f-led OFF
digitalWrite(19,HIGH ); // g-led OFF
digitalWrite(13, HIGH); // dp-led ON
delay(1000); //1sec delay
}