int a=0;
int b=0;

void setup() {
  Serial.begin(9600);
  for( int i=2;i<9;i++)
  {
    pinMode(i,OUTPUT);
  }
  pinMode(12, INPUT);
}

void loop() {
int x=digitalRead(12);
 if (x == HIGH)
{

   a= random(1,7);

  switch(a)
  {
    case 1:
    {
      digitalWrite(8, HIGH);
      break;
    }
    case 2:
    {
      digitalWrite(3, HIGH);
      digitalWrite(6, HIGH);
      break;
    }

    case 3:
    {
      digitalWrite(3, HIGH);
      digitalWrite(6, HIGH);
       digitalWrite(8, HIGH);
      break;
    }
    case 4:
    {
      digitalWrite(2, HIGH);
      digitalWrite(4, HIGH);
      digitalWrite(5, HIGH);
      digitalWrite(7, HIGH);
      break;
    }
    case 5:
    {
      digitalWrite(2, HIGH);
      digitalWrite(4, HIGH);
      digitalWrite(5, HIGH);
      digitalWrite(7, HIGH);
      digitalWrite(8, HIGH);
      break;
    }
    case 6:
    {
      digitalWrite(2, HIGH);
      digitalWrite(3, HIGH);
      digitalWrite(4, HIGH);
      digitalWrite(5, HIGH);
      digitalWrite(6, HIGH);
      digitalWrite(7, HIGH);
      break;
    }
  }

  delay(4000);
   for (int j=2;j<9;j++)
    {
      digitalWrite(j, LOW);
    }
}

 else if (digitalRead(12 == LOW))
 {
    b=random(1,7);
    switch(b)
    {
         case 1:
    {
      digitalWrite(8, HIGH);
      break;
    }
    case 2:
    {
      digitalWrite(3, HIGH);
      digitalWrite(6, HIGH);
      break;
    }

    case 3:
    {
      digitalWrite(3, HIGH);
      digitalWrite(6, HIGH);
       digitalWrite(8, HIGH);
      break;
    }
    case 4:
    {
      digitalWrite(2, HIGH);
      digitalWrite(4, HIGH);
      digitalWrite(5, HIGH);
      digitalWrite(7, HIGH);
      break;
    }
    case 5:
    {
      digitalWrite(2, HIGH);
      digitalWrite(4, HIGH);
      digitalWrite(5, HIGH);
      digitalWrite(7, HIGH);
      digitalWrite(8, HIGH);
      break;
    }
    case 6:
    {
      digitalWrite(2, HIGH);
      digitalWrite(3, HIGH);
      digitalWrite(4, HIGH);
      digitalWrite(5, HIGH);
      digitalWrite(6, HIGH);
      digitalWrite(7, HIGH);
      break;
    }
    } 
    delay(200);
    for (int j=2;j<9;j++)
    {
      digitalWrite(j, LOW);
    }
  }
  Serial.print(a);
  Serial.print(" ");
Serial.println(b);
 }