void setup() {
  // put your setup code here, to run once:
for (int i=0; i<10; i++)
pinMode(i, OUTPUT);
randomSeed(analogRead(0));
}
void leftright_LEDON() {
  for (int i=0; i<10; i++)
  {
    digitalWrite(i, HIGH);
    delay(200);

  }
}
void leftright_LEDOFF() {
  for (int i=0; i<10; i++)
  {
    digitalWrite(i, LOW);
    delay(200);

  }
}
void FLASHALL() {
for (int j=0; j<12; j++){
  delay (200);
  for (int i=0; i<10; i++)
  {
    if (j%2==1) digitalWrite(i, LOW);
    else digitalWrite(i, HIGH);
  }
}
}

void Left_RightON() {
leftright_LEDOFF();
  for (int i=0; i<5; i++){
    digitalWrite(i, HIGH);
    digitalWrite(9-i, HIGH);
    delay(200);
  }

}
void Center_OutOFF() {

  for (int i=4; i>=0; i--){
    digitalWrite(i, LOW);
    digitalWrite(9-i, LOW);
    delay(200);
  }

}

void Random_OnOff(){
  int randNumber=0;
  for (int i=0; i<150;i++){
    
  randNumber = random(0, 10);
  digitalWrite(randNumber, HIGH);
  delay(80);
   digitalWrite(randNumber, LOW);
  }
}

void rightleft_LEDON(){
  for (int i=9; i>=0; i--)
  {
    digitalWrite(i, HIGH);
    delay(200);

  }
}

void loop() {
leftright_LEDON();
leftright_LEDOFF();
rightleft_LEDON();
FLASHALL();
for (int i=0; i<4; i++){
  Left_RightON();
  delay(200);
  Center_OutOFF();
  delay(200);
}
Random_OnOff();
  // put your main code here, to run repeatedly:

}