#define DS1_pin 4
#define SHCP1_pin 2
#define STCP1_pin 3
#define sensePin A0

int val1,val2,analogValue;
int ammo = 25;
int   digits [10][8]{
  {0,1,1,1,1,1,1,0}, // digit 0
  {0,0,1,1,0,0,0,0}, // digit   1
  {0,1,1,0,1,1,0,1}, // digit 2
  {0,1,1,1,1,0,0,1}, // digit 3
  {0,0,1,1,0,0,1,1},   // digit 4
  {0,1,0,1,1,0,1,1}, // digit 5
  {0,1,0,1,1,1,1,1}, // digit 6
  {0,1,1,1,0,0,0,0}, // digit 7
  {0,1,1,1,1,1,1,1}, // digit 8
  {0,1,1,1,1,0,1,1}   // digit 9
};
void DisplayDigit(int   Digit,int numy)
{
  if (numy ==1){
    digits[Digit][0] = 1;
  } else{
    digits[Digit][0] = 0;
  }
    digitalWrite(STCP1_pin,LOW);
    for (int i = 7; i>=0; i--)
    {
    digitalWrite(SHCP1_pin,LOW);
    if (digits[Digit][i]==1) digitalWrite(DS1_pin,   LOW); 
    if (digits[Digit][i]==0) digitalWrite(DS1_pin, HIGH);
    digitalWrite(SHCP1_pin,HIGH);
    }
   digitalWrite(STCP1_pin, HIGH); 
}

void setup() {     
  pinMode(DS1_pin, OUTPUT);
  pinMode(STCP1_pin, OUTPUT);
  pinMode(SHCP1_pin,   OUTPUT);
  pinMode(sensePin,OUTPUT);
}

void loop(){ 

  analogValue = map(analogRead(sensePin), 0, 1023, 0, ammo);
  val1 = analogValue/10 %10;
  val2 = analogValue % 10;

if (val1 != 0){
  DisplayDigit(val1,1);
}else if(val1 == 0){DisplayDigit(val2,0);}
  delay(5);
  DisplayDigit(val2,0);
  delay(5);
}