int led1 = 13;
int led2 = 12;
int led3 = 11;
int led4 = 10;
int led5 = 9;
int led6 = 8;
int led7 = 7;

void setup()
{
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
  pinMode(led6, OUTPUT);
  pinMode(led7, OUTPUT);
}
void case1()
{
  digitalWrite(led1,1);
  digitalWrite(led2,1);
  digitalWrite(led3,1);
  digitalWrite(led4,1);
  digitalWrite(led5,1);
  digitalWrite(led6,1);
  digitalWrite(led7,0);
}
void case2()
{
  digitalWrite(led1,0);
  digitalWrite(led2,1);
  digitalWrite(led3,1);
  digitalWrite(led4,0);
  digitalWrite(led5,0);
  digitalWrite(led6,0);
  digitalWrite(led7,0);
}
void case3()
{
  digitalWrite(led1,1);
  digitalWrite(led2,1);
  digitalWrite(led3,0);
  digitalWrite(led4,1);
  digitalWrite(led5,1);
  digitalWrite(led6,0);
  digitalWrite(led7,1);
}
void case4()
{
  digitalWrite(led1,1);
  digitalWrite(led2,1);
  digitalWrite(led3,1);
  digitalWrite(led4,1);
  digitalWrite(led5,0);
  digitalWrite(led6,0);
  digitalWrite(led7,1);
}
void case5()
{
  digitalWrite(led1,0);
  digitalWrite(led2,1);
  digitalWrite(led3,1);
  digitalWrite(led4,0);
  digitalWrite(led5,0);
  digitalWrite(led6,1);
  digitalWrite(led7,1);
}
void case6()
{
  digitalWrite(led1,1);
  digitalWrite(led2,0);
  digitalWrite(led3,1);
  digitalWrite(led4,1);
  digitalWrite(led5,0);
  digitalWrite(led6,1);
  digitalWrite(led7,1);
}
void case7()
{
  digitalWrite(led1,1);
  digitalWrite(led2,0);
  digitalWrite(led3,1);
  digitalWrite(led4,1);
  digitalWrite(led5,1);
  digitalWrite(led6,1);
  digitalWrite(led7,1);
}
void case8()
{
  digitalWrite(led1,1);
  digitalWrite(led2,1);
  digitalWrite(led3,1);
  digitalWrite(led4,0);
  digitalWrite(led5,0);
  digitalWrite(led6,0);
  digitalWrite(led7,0);
}
void case9()
{
  digitalWrite(led1,1);
  digitalWrite(led2,1);
  digitalWrite(led3,1);
  digitalWrite(led4,1);
  digitalWrite(led5,1);
  digitalWrite(led6,1);
  digitalWrite(led7,1);
}
void case10()
  {
  digitalWrite(led1,1);
  digitalWrite(led2,1);
  digitalWrite(led3,1);
  digitalWrite(led4,1);
  digitalWrite(led5,0);
  digitalWrite(led6,1);
  digitalWrite(led7,1);
  }
void loop()
{
  case1();
  delay(500);
  case2();
  delay(500);
  case3();
  delay(500);
  case4();
  delay(500);
  case5();
  delay(500);
  case6();
  delay(500);
  case7();
  delay(500);
  case8();
  delay(500);
  case9();
  delay(500);
  case10();
  delay(500);
}