arduino led squence

/*
Simples arduino led test sequence
author: Cooler_


DMR RIP :-(

     Homenagem Especial ao DMR
    ================================

                                                  _|_
                                                 `-|-`
                                                   |
                                               .-'~^~`-.
                                             .' _     _ `.
                                             | |_) | |_) |
                                             | | \ | |   |
                                             |   DMR     |
            -."-/\\\/:::.    `\."-._'."-"_\\-|   08-10   |///."-
            " -."-.\\"-."//.-".`-."_\\-.".-\\`=.........=`//-".


*/

int sequencia1=0,sequencia2=0;
int x=8;

void setup()
{
  int y=8;
  while(y!=14)
  {
   pinMode(y,OUTPUT);
   y++;
  }

  pinMode(2,INPUT);
  pinMode(3,INPUT);
}

void loop()
{
 sequencia1=digitalRead(2);
 sequencia2=digitalRead(3);

 if(sequencia1 == HIGH)
 {
  int z=2;
  while(z!=0)
  {
   while(x!=14)
   {
    digitalWrite(x,HIGH);
    delay(50);
    x++;
   }
   while(x!=7)
   {
    digitalWrite(x,LOW);
    delay(50);
    x--;
   }
   z--;
  }
  z=3;
  while(z!=0)
  {
   while(x!=7)
   {
    digitalWrite(x,HIGH);
    delay(50);
    x--;
   }
   while(x!=14)
   {
    digitalWrite(x,LOW);
    delay(50);
    x++;
   }
   z--;
  }
 } else {
  while(x!=7)
  {
   digitalWrite(x,LOW);
   delay(80);
   x--;
  }
 }

 ////////////////////////////// sequencia 2
 if(sequencia2 == HIGH)
 {
  int z=2;
  while(z!=0)
  {
   while(x!=14)
   {
    if((x&1)!=0)
    {
     digitalWrite(x,HIGH);
    }
    delay(30);
    x++;
   }
   while(x!=7)
   {
    if((x&1)!=0)
    {
     digitalWrite(x,LOW);
    }
    delay(30);
    x--;
   }

   while(x!=14)
   {
    if(!(x&1))
    {
     digitalWrite(x,HIGH);
    }
    delay(30);
    x++;
   }
   while(x!=7)
   {
    if(!(x&1))
    {
     digitalWrite(x,LOW);
    }
    delay(30);
    x--;
   }

   z--;
  }

 } else {
  while(x!=7)
  {
    if((x&1)!=0)
    {
     digitalWrite(x,LOW);
     delay(30);
    }
   x--;
  }
 }

}