Ретро часы на ИН-16 (Arduino)

#include <MsTimer2.h>
#include <iarduino_RTC.h>

#define DS_DAT 11
#define DS_CLK 12
#define SS_RST 13
  iarduino_RTC time(RTC_DS1302, SS_RST, DS_CLK, DS_DAT);
  int an, segm,times,i;
  byte a[4];
 
void setup(){  time.begin();MsTimer2::set(4, to_Timer);MsTimer2::start();
  
 pinMode(2,OUTPUT); // D2 === H1
 pinMode(3,OUTPUT); // D3 === H2
 pinMode(4,OUTPUT); // D4 === H3
 pinMode(5,OUTPUT); // D5 === H4
 pinMode(6,OUTPUT);  // D6  === A0 3 ид1 
 pinMode(7,OUTPUT);  // D7  === A1 6 ид1
 pinMode(8,OUTPUT);  // D8  === A2 7 ид1
 pinMode(10,OUTPUT); // D10 === A3 4 ид1


}
 
void loop(){ 
  time.gettime();
  times = time.Hours*100+time.minutes;
  a[0]=times/1000;
  a[1]=times/100%10;
  a[2]=times/10%10;
  a[3]=times%10%10;
  }
 
void to_Timer(){
  switch(i){
    case 0: segm=a[0]; an=0; anod(); segment();delay(1);break;
    case 1: segm=a[1]; an=1; anod(); segment();delay(1);break;
    case 2: segm=a[2]; an=2; anod(); segment();delay(1);break;
    case 3: segm=a[3]; an=3; anod(); segment();delay(1);break;}i++;if(i>3){i=0;}}
 
 
void segment(){
  switch(segm){                                                                 
    case 0: digitalWrite(10,LOW);digitalWrite(8,LOW);digitalWrite(7,LOW);digitalWrite(6,LOW);break;     // DEC 0 = 0b0000
    case 1: digitalWrite(10,LOW);digitalWrite(8,LOW);digitalWrite(7,LOW);digitalWrite(6,HIGH);break;    // DEC 1 = 0b0001
    case 2: digitalWrite(10,LOW);digitalWrite(8,LOW);digitalWrite(7,HIGH);digitalWrite(6,LOW);break;    // DEC 2 = 0b0010
    case 3: digitalWrite(10,LOW);digitalWrite(8,LOW);digitalWrite(7,HIGH);digitalWrite(6,HIGH);break;   // DEC 3 = 0b0011
    case 4: digitalWrite(10,LOW);digitalWrite(8,HIGH);digitalWrite(7,LOW);digitalWrite(6,LOW);break;    // DEC 4 = 0b0100
    case 5: digitalWrite(10,LOW);digitalWrite(8,HIGH);digitalWrite(7,LOW);digitalWrite(6,HIGH);break;   // DEC 5 = 0b0101
    case 6: digitalWrite(10,LOW);digitalWrite(8,HIGH);digitalWrite(7,HIGH);digitalWrite(6,LOW);break;   // DEC 6 = 0b0110
    case 7: digitalWrite(10,LOW);digitalWrite(8,HIGH);digitalWrite(7,HIGH);digitalWrite(6,HIGH);break;  // DEC 7 = 0b0111
    case 8: digitalWrite(10,HIGH);digitalWrite(8,LOW);digitalWrite(7,LOW);digitalWrite(6,LOW);break;    // DEC 8 = 0b1000
    case 9: digitalWrite(10,HIGH);digitalWrite(8,LOW);digitalWrite(7,LOW);digitalWrite(6,HIGH);break;   // DEC 9 = 0b0110
  }}
void anod(){
  switch(an){                                                             
    case 0: digitalWrite(2,HIGH);digitalWrite(3,LOW);digitalWrite(4,LOW);digitalWrite(5,LOW);break;    
    case 1: digitalWrite(2,LOW);digitalWrite(3,HIGH);digitalWrite(4,LOW);digitalWrite(5,LOW);break;   
    case 2: digitalWrite(2,LOW);digitalWrite(3,LOW);digitalWrite(4,HIGH);digitalWrite(5,LOW);break;   
    case 3: digitalWrite(2,LOW);digitalWrite(3,LOW);digitalWrite(4,LOW);digitalWrite(5,HIGH);break;   
  }}