Arduino for Kids- LED's

/*
 * Arduino for Kids: LED's
 *
 * learnelectronics
 * 7 JUN 2017
 * www.youtube.com/c/learnelectronics
 * [email protected]
 *
 * Note: This sketch uses pink LED's with a Vf of 3.0V and 330R resistors.
 */




void setup() {

  pinMode(3,OUTPUT);          //set all used pins (3,5,6,9,10,11) as OUTPUT
  pinMode(5,OUTPUT);
  pinMode(6,OUTPUT);
  pinMode(9,OUTPUT);
  pinMode(10,OUTPUT);
  pinMode(11,OUTPUT);
  digitalWrite(3,HIGH);       //light up all LED's for 1 second
  digitalWrite(5,HIGH);
  digitalWrite(6,HIGH);
  digitalWrite(9,HIGH);
  digitalWrite(10,HIGH);
  digitalWrite(11,HIGH);
  delay(1000);
  digitalWrite(3,LOW);        //turn off all LED's
  digitalWrite(5,LOW);
  digitalWrite(6,LOW);
  digitalWrite(9,LOW);
  digitalWrite(10,LOW);
  digitalWrite(11,LOW);
}

void randomness(){            //random LED turns on for 100mS
  for(int z=1;z<20;z++){      //do it 20 times
   randomSeed(analogRead(0)); //set randomseed for analog 0
   int i=random(2,12);        //random number between 2 & 11
   digitalWrite(i,HIGH);      //turn on random LED
   delay(100);                //wait 100mS
   digitalWrite(i,LOW);       //turn it off
   delay(100);                //wait 100mS
  }
}

void larson(){                //Larson Scanner (Knight Rider)
  int wt=100;                 //delay time


  digitalWrite(3,HIGH);       //turn on first LED
  delay(wt);                  //wait
  digitalWrite(3,LOW);        //turn off first LED
  digitalWrite(5,HIGH);       //turn on next LED
  delay(wt);                  //wait
  digitalWrite(5,LOW);
  digitalWrite(6,HIGH);
  delay(wt);
  digitalWrite(6,LOW);
  digitalWrite(9,HIGH);
  delay(wt);
  digitalWrite(9,LOW);
  digitalWrite(10,HIGH);
  delay(wt);
  digitalWrite(10,LOW);
  digitalWrite(11,HIGH);
  delay(wt);
  digitalWrite(11,LOW);
  digitalWrite(10,HIGH);
  delay(wt);
  digitalWrite(10,LOW);
  digitalWrite(9,HIGH);
  delay(wt);
  digitalWrite(9,LOW);
  digitalWrite(6,HIGH);
  delay(wt);
  digitalWrite(6,LOW);
  digitalWrite(5,HIGH);
  delay(wt);
  digitalWrite(5,LOW);
  digitalWrite(3,HIGH);
  delay(wt);
  digitalWrite(3,LOW);
}

void nerp(){                  //switch between odds and evens
  for(int i=1;i<20;i++){      //do it 20 times
    digitalWrite(3,HIGH);     //odd on
    digitalWrite(6,HIGH);     //odd on
    digitalWrite(10,HIGH);    //odd on
    delay(200);               //wait
    digitalWrite(3,LOW);      //odd off
    digitalWrite(6,LOW);      //odd off
    digitalWrite(10,LOW);     //odd off
    digitalWrite(5,HIGH);     //even on
    digitalWrite(9,HIGH);     //even on
    digitalWrite(11,HIGH);    //even on
    delay(200);               //wait
    digitalWrite(5,LOW);      //even off
    digitalWrite(9,LOW);      //even off
    digitalWrite(11,LOW);     //even off
  }
}


void loop() {

nerp();
delay(1000);
randomness();
delay(1000);
larson();
larson();
larson();

}