RESET:
        ser r16
        out DDRB, r16       ; Port B Data Direction Register
loop:
        out PORTB, r16      ; Port B Data Register
        sbis    PIND, PIND0 ; Port D Input Pins Address
        inc r16
        sbis    PIND, PIND1 ; Port D Input Pins Address
        dec r16
        sbis    PIND, PIND2 ; Port D Input Pins Address
        ror r16
        sbis    PIND, PIND3 ; Port D Input Pins Address
        rol r16
        sbis    PIND, PIND4 ; Port D Input Pins Address
        com r16
        sbis    PIND, PIND5 ; Port D Input Pins Address
        neg r16
        sbis    PIND, PIND6 ; Port D Input Pins Address
        swap    r16

delay:
        dec r17
        brne    delay
        dec r18
        brne    delay

        rjmp    loop