Coding CodeWizardAVR 7 Segment 8 Digit

/*****************************************************
This program was produced by the
CodeWizardAVR V2.05.3 Standard
Automatic Program Generator
© Copyright 1998-2011 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com

Project :
Version :
Date    : 6/13/2016
Author  : tyery08
Company : embeeminded.blogspot.com
Comments:


Chip type               : ATmega16
Program type            : Application
AVR Core Clock frequency: 8.000000 MHz
Memory model            : Small
External RAM size       : 0
Data Stack size         : 256
*****************************************************/

#include <mega16.h>
#include <delay.h>

char angka[]={0b00001010,0b11111010,0b01001100,0b01101000,0b10111000,0b00101001,0b00001001,0b01111010,0b00001000,0b00101000};
int i;
int data;
int jam,menit,detik;
int satuan_jam, puluhan_jam;
int satuan_menit, puluhan_menit;
int satuan_detik, puluhan_detik;

// Timer 0 overflow interrupt service routine
interrupt [TIM0_OVF] void timer0_ovf_isr(void)
{
// Place your code here
      TCCR0=0x04;
      TCNT0=0xD4;
     
      data++;
      if(data==1000) { detik++; data=0; }
      if(detik>59) { detik=0; menit++; } 
      if(menit>59) { menit=0; jam++; }
      if(jam>23) jam=0;
}

// Declare your global variables here

void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0
PORTA=0x00;
DDRA=0xFF;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0
PORTC=0x00;
DDRC=0xFF;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=0xFF
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=0xFFFF
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer2 Stopped
// Mode: Normal top=0xFF
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x01;

// USART initialization
// USART disabled
UCSRB=0x00;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// ADC initialization
// ADC disabled
ADCSRA=0x00;

// SPI initialization
// SPI disabled
SPCR=0x00;

// TWI initialization
// TWI disabled
TWCR=0x00;

// Global enable interrupts
#asm("sei")

jam=19;
menit=50;
detik=0;


while (1)
      {
      // a f e d . c g b
     
      TCCR0=0x04;
      puluhan_jam=jam/10;
      satuan_jam=jam%10;
     
      puluhan_menit=menit/10;
      satuan_menit=menit%10;
     
      puluhan_detik=detik/10;
      satuan_detik=detik%10;
      // Place your code here
      PORTA=0b00000001; PORTC=angka[puluhan_jam]; delay_ms(2);
      PORTA=0b00000010; PORTC=angka[satuan_jam]; delay_ms(2);
      PORTA=0b00000100; PORTC=0b11111101; delay_ms(2);
      PORTA=0b00001000; PORTC=angka[puluhan_menit]; delay_ms(2);
      PORTA=0b00010000; PORTC=angka[satuan_menit]; delay_ms(2);
      PORTA=0b00100000; PORTC=0b11111101; delay_ms(2);
      PORTA=0b01000000; PORTC=angka[puluhan_detik]; delay_ms(2);
      PORTA=0b10000000; PORTC=angka[satuan_detik]; delay_ms(2);  
     
      }
}