PIC16F877A one-digit decimal number is incremented every 0.5 second

Start PICSimLab. Select the board McLab2. Select PIC16F877A as
microcontroller using the micro-controller tab. Configure the microcontroller through your code as follows:

__CONFIG _FOSC_XT & _WDTE_OFF & _PWRTE_OFF & _MCLRE_OFF & _BOREN_OFF &
_LVP_OFF & _CPD_OFF & _CP_OFF

Program the microcontroller so that one-digit decimal number is incremented every 0.5second as shown in