byte s = 0;
  byte i = 0;
  byte digit1 = 0;
  byte digit2 = 1;
  byte Switch[] = {10, 11, 12, 13};
  byte A[] = {2, 3, 4, 5, 6, 7, 8, A0, A1, A2, A3, A4, A5, 9};
  
  void setup() {
  
    pinMode(digit1, OUTPUT);
    pinMode(digit2, OUTPUT);
    for (s = 0; s < sizeof(Switch); s++) {
      pinMode(Switch[s], INPUT);
    }
    for (i = 0; i < sizeof(A); i++) {
      pinMode(A[i], OUTPUT);
    }
  }
  
  void loop() {
    digitalWrite(digit1, 0);
    digitalWrite(digit2, 0);
    //Display 1
    if ( digitalRead(10) == 1 && digitalRead(11) == 0 && digitalRead(12) == 0 && digitalRead(13) == 0 ) {
      digitalWrite(digit1, 1);
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 3 || A[i] == 4) {
          digitalWrite(A[i], 0);
        } else {
          digitalWrite(A[i], 1);
        }
      }
    }  //Display 2
    if ( digitalRead(10) == 0 && digitalRead(11) == 1 && digitalRead(12) == 0 && digitalRead(13) == 0 ) {
      digitalWrite(digit1, 1);
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 7 || A[i] == 4 ) {
          digitalWrite(A[i], 1);
        } else {
          digitalWrite(A[i], 0);
        }
      }
    }
    //Display 4
    if ( digitalRead(10) == 0 && digitalRead(11) == 0 && digitalRead(12) == 1 && digitalRead(13) == 0 ) {
      digitalWrite(digit1, 1);
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 2 || A[i] == 5 || A[i] == 6  ) {
          digitalWrite(A[i], 1);
        } else {
          digitalWrite(A[i], 0);
        }
      }
    }
    //Display 8
    if (digitalRead(10) == 0 && digitalRead(11) == 0 && digitalRead(12) == 0 && digitalRead(13) == 1 ) {
      digitalWrite(digit1, 1);
      for (i = 0; i < sizeof(A); i++) {
        digitalWrite(A[i], 0);
      }
  
    }
    //Display 3
    if ( digitalRead(10) == 1 && digitalRead(11) == 1 && digitalRead(12) == 0 && digitalRead(13) == 0 ) {
      digitalWrite(digit1, 1);
  
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 7 || A[i] == 6 ) {
          digitalWrite(A[i], 1);
        } else {
          digitalWrite(A[i], 0);
        }
      }
    }
    //Display 5
    if (digitalRead(10) == 1 && digitalRead(11) == 0 && digitalRead(12) == 1 && digitalRead(13) == 0 ) {
      digitalWrite(digit1, 1);
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 3 || A[i] == 6 ) {
          digitalWrite(A[i], 1);
        } else {
          digitalWrite(A[i], 0);
        }
      }
    }
    //Display 6
    if ( digitalRead(10) == 0 && digitalRead(11) == 1 && digitalRead(12) == 1 && digitalRead(13) == 0 ) {
      digitalWrite(digit1, 1);
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 3 ) {
          digitalWrite(A[i], 1);
        } else {
          digitalWrite(A[i], 0);
        }
      }
    }
    //Display 7
    if ( digitalRead(10) == 1 && digitalRead(11) == 1 && digitalRead(12) == 1 && digitalRead(13) == 0) {
      digitalWrite(digit1, 1);
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 2 || A[i] == 3 || A[i] == 4  ) {
          digitalWrite(A[i], 0);
        } else {
          digitalWrite(A[i], 1);
        }
      }
    }
    //Display 9
    if ( digitalRead(10) == 1 && digitalRead(11) == 0 && digitalRead(12) == 0 && digitalRead(13) == 1) {
      digitalWrite(digit1, 1);
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 6  ) {
          digitalWrite(A[i], 1);
        } else {
          digitalWrite(A[i], 0);
        }
      }
    }
    //Display 10
    if ( digitalRead(10) == 0 && digitalRead(11) == 1 && digitalRead(12) == 0 && digitalRead(13) == 1) {
      digitalWrite(digit1, 1);
      digitalWrite(digit2, 1);
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 8 || A[i] == A0 || A[i] == A3 || A[i] == A4 || A[i] == A5 || A[i] == 9 ) {
          digitalWrite(A[i], 1);
        } else {
          digitalWrite(A[i], 0);
        }
      }
    }
    //Display 11
    if ( digitalRead(10) == 1 && digitalRead(11) == 1 && digitalRead(12) == 0 && digitalRead(13) == 1) {
      digitalWrite(digit1, 1);
      digitalWrite(digit2, 1);
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 3 || A[i] == 4 || A[i] == A1 || A[i] == A2 ) {
          digitalWrite(A[i], 0);
        } else {
          digitalWrite(A[i], 1);
        }
      }
    }
    //Display 12
    if ( digitalRead(10) == 0 && digitalRead(11) == 0 && digitalRead(12) == 1 && digitalRead(13) == 1) {
      digitalWrite(digit1, 1);
      digitalWrite(digit2, 1);
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 2 || A[i] == 3 || A[i] == 5 || A[i] == 6 || A[i] == 8 || A[i] == A1 || A[i] == A2 ) {
          digitalWrite(A[i], 0);
        } else {
          digitalWrite(A[i], 1);
        }
      }
    }
    //Display 13
    if ( digitalRead(10) == 1 && digitalRead(11) == 0 && digitalRead(12) == 1 && digitalRead(13) == 1) {
     digitalWrite(digit1, 1);
      digitalWrite(digit2, 1);
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 2 || A[i] == 3 || A[i] == 4 || A[i] == 5 ||  A[i] == 8 || A[i] == A1 || A[i] == A2 ) {
          digitalWrite(A[i], 0);
        } else {
          digitalWrite(A[i], 1);
        }
      }
    }
    //Display 14
    if ( digitalRead(10) == 0 && digitalRead(11) == 1 && digitalRead(12) == 1 && digitalRead(13) == 1) {
       digitalWrite(digit1, 1);
      digitalWrite(digit2, 1);
      for (i = 0; i < sizeof(A); i++) {
        if ( A[i] == 3 || A[i] == 4 || A[i] == 7 ||  A[i] == 8 || A[i] == A1 || A[i] == A2 ) {
          digitalWrite(A[i], 0);
        } else {
          digitalWrite(A[i], 1);
        }
      }
    }
    //Display 15
    if ( digitalRead(10) == 1 && digitalRead(11) == 1 && digitalRead(12) == 1 && digitalRead(13) == 1) {
        digitalWrite(digit1, 1);
      digitalWrite(digit2, 1);
      for (i = 0; i < sizeof(A); i++) {
        if (A[i] == 2 || A[i] == 4 || A[i] == 5 || A[i] == 7 ||  A[i] == 8 || A[i] == A1 || A[i] == A2 ) {
          digitalWrite(A[i], 0);
        } else {
          digitalWrite(A[i], 1);
        }
      }
    }
  }