int pins[] = {12, 11, 10, 9, 8, 7, 6};
int buttonINP[] = {A0, A1, A2};
int i = 0;
int j = 0;



int sevState = 0; //Start Blank Display
int sevState1 = 0;
int sevState2 = 0;

int buttonOldA0 = 1; 
int buttonNewA0;

int buttonOldA1 = 1;
int buttonNewA1;

int buttonOldA2 = 1;
int buttonNewA2;



void displayLetter( int value)
{
   
  digitalWrite(12, bitRead(value,6)); 
  digitalWrite(11, bitRead(value,5)); 
  digitalWrite(10, bitRead(value,4)); 
  digitalWrite(9, bitRead(value,3));  
  digitalWrite(8, bitRead(value,2));  
  digitalWrite(7, bitRead(value,1));  
  digitalWrite(6, bitRead(value,0));  
  
}  




void setup()
{
  for(i=0; i<7; i++)
  {
   pinMode(pins[i], OUTPUT);
  }
  for(j=0; j<4; j++)
  {
   pinMode(buttonINP[j], INPUT);
  }
   
}


void loop()
{
  
  buttonNewA0 = digitalRead(A0);
  buttonNewA1 = digitalRead(A1);
  
  if(buttonOldA0 == 0 && buttonNewA0 ==1)
  {
  		if(sevState1 == 0)
        {
         			//abcdefg C
     	displayLetter(B1001110);
        sevState1 = 1;
    
        }
    
    	else if (sevState1 == 1)
        {
        			 //abcdefg b
     	displayLetter(B0011111);
        sevState1 = 2;
        }
    
    	else if (sevState1 == 2) 
        {
        			 //abcdefg A
     	displayLetter(B1110111);;
        sevState = 3;
        }
  
  }
  
  buttonOldA0 = buttonNewA0;
  
  
  
  
  
  if(buttonOldA1 == 0 && buttonNewA1 ==1 && buttonOldA0 == 1)
  {
  		if(sevState1 == 0)
        {
         			//abcdefg C
     	displayLetter(B1001110);
        sevState1 = 1;
    
        }
    
    	else if (sevState1 == 1)
        {
        			 //abcdefg b
     	displayLetter(B0011111);
        sevState1 = 2;
        }
    
    	else if (sevState1 == 2) 
        {
        			 //abcdefg A
     	displayLetter(B1110111);;
        sevState = 3;
        }
  
  }
  
  buttonOldA1 = buttonNewA1;
  
  
  
  
  
  
  if(buttonOldA2 == 0 && buttonNewA2 ==1)
  {
  		if(sevState2 == 0)
        {
         			 //abcdefg blank
     	displayLetter(B0000000);
        sevState = 1;
        }
    
  }
  
  buttonOldA2 = buttonNewA2;
  
	
  
}