Seven Segment Display Scrolling

#define SHIFT_CLOCK PORTB.F1    //Clock Connection of 74HC595 SSD Driver
#define SHIFT_LATCH PORTB.F3    //Latch Connection of 74HC595 SSD Driver
#define SHIFT_DATA PORTB.F2    //Data Connection of 74HC595 SSD Driver

char array4[4] = {6, 91, 79, 102};           //Display 1234 on SSD
char digit[4] = {0xFE, 0xFD, 0xFB, 0xF7};   //Switch on the SSD digits one by one

char i,j,temp,flag1,flag2;

void InitTimer0()
{
 OPTION_REG     = 0x86;
 TMR0           = 6;
 INTCON         = 0xA0;
}

void latch595()
{
 SHIFT_LATCH = 1;
 Delay_us(1);
 SHIFT_LATCH = 0;
}

void shiftdata595(unsigned char _shiftdata)
{
 int i;
 unsigned char temp;
 temp = _shiftdata;
 i=8;
 while (i>0)
 {
  if (temp.F7==0)
   {
    SHIFT_DATA = 0;
   }
   else
   {
    SHIFT_DATA = 1;
   }
   temp = temp<<1;
   SHIFT_CLOCK = 1;
   SHIFT_CLOCK = 0;
   i--;
 }
}

void Interrupt()
{
 if (TMR0IF_bit)
 {
  TMR0IF_bit  = 0;
  TMR0        = 6;
  flag1 = 1;
  flag2 = 1;
 }
}

void main()
{
 TRISB = 0;
 TRISC.F1 = 1;
 InitTimer0();
 while (1)
 {
  if (PORTC.F1==0)
  {
   if (flag2==1)
   {
    shiftdata595(digit[i]);
    i++;
    if(i==4)
    {
     i=0;
    }
    if (flag1==1)
    {
     shiftdata595(array4[j]);
     latch595();
     j++;
     if (j==4)
     {
      j=0;
     }
    }
   }
  }
  else if(PORTC.F1==1)
  {
   shiftdata595(0);
   shiftdata595(0);
   latch595();
  }
 }
}

temp = array4[0];
for (n=1; n<8; n++)
{
 array4[j-1] = array[j];
}
array[9] = temp;

temp = array4[0];
for (n=1; n<8; n++)
{
 array4[j-1] = array[j];
}
array[9] = temp;

temp = array4[0];
for (n=1; n<8; n++)
{
 array4[n-1] = array4[n];
}
array4[9] = temp;