void setup() 
{
   pinMode(12, OUTPUT);
   pinMode(10, OUTPUT);
   pinMode(11, OUTPUT);
   pinMode(13, OUTPUT);
   pinMode(7, INPUT_PULLUP);
   pinMode(8, INPUT_PULLUP);
   pinMode(9, INPUT_PULLUP);
   pinMode(6, INPUT_PULLUP);
   pinMode(5, INPUT_PULLUP);
}

void loop() 
{
  

  if(digitalRead(6)==0) 
  digitalWrite(12, HIGH) ;

  if(digitalRead(6)==1) 
  digitalWrite(12, HIGH) ;
 
}