LIST p=16F887
#include <p16F887.inc>
    __CONFIG    _CONFIG1, _LVP_OFF & _FCMEN_OFF & _IESO_OFF & _BOR_OFF & _CPD_OFF & _CP_OFF & _MCLRE_OFF & _PWRTE_ON & _WDT_OFF & _INTRC_OSC_NOCLKOUT
    __CONFIG    _CONFIG2, _WRT_OFF & _BOR21V

cblock 0x20
Display
Delay1
Delay2
     endc


     org 0
Start:
     bsf     STATUS,RP0
     clrf     TRISD
     bcf STATUS,RP0
     movlw 1
     movwf Display

OloloLoop:
     movf Display,W
     movwf PORTD

OloloDelay:
     decfsz Delay1,f
     goto OloloDelay
     decfsz Delay2,f
     goto OloloDelay

     bcf STATUS,C
     rlf Display,f
     btfsc STATUS,C
     bsf Display,0

     goto OloloLoop

     end