Four LED blinking in pattern programming by ARDUINO






//program for 4 LED blinking one by one
//by-ALOK KUMAR PANDEY
//..........................................................................................//


int led1=13, led2 = 12, led3 = 11, led4 =10; // All pin are difined by variables
void setup()
{
  pinMode(led1, OUTPUT);         // here pin 13(i.e. led1) set as output pin
  pinMode(led2, OUTPUT);         // here pin 12(i.e. led2) set as output pin
  pinMode(led3, OUTPUT);         // here pin 11(i.e. led3) set as output pin
  pinMode(led4, OUTPUT);         // here pin 10(i.e. led4) set as output pin
}

void loop()
{
 digitalWrite(led1, HIGH);       // here we set led1 as high(i.e. pin no. 13) it means led1 get on.
 delay(1000);                    //delay of one second
 digitalWrite(led1,LOW);        // here we set led1 as low(i.e. pin no. 13) it means led1 get off.
 digitalWrite(led2, HIGH);      // here we set led2 as high(i.e. pin no. 12) it means led1 get on.
 delay(1000);                    //delay of one second   
 digitalWrite(led2,LOW);        // here we set led2 as low(i.e. pin no. 12) it means led1 get off.
 digitalWrite(led3, HIGH);      // here we set led3 as high(i.e. pin no. 11) it means led1 get on.
 delay(1000);                    //delay of one second
 digitalWrite(led3,LOW);        // here we set led3 as low(i.e. pin no. 11) it means led1 get off.
 digitalWrite(led4, HIGH);      // here we set led4 as high(i.e. pin no. 10) it means led1 get on.
 delay(1000);                    //delay of one second
 digitalWrite(led4,LOW);        // here we set led4 as low(i.e. pin no. 10) it means led1 get off.
 //delay(1000);                   //delay of one second
 }

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