.include "m169def.inc"

.org 0x0000
    rjmp RESET

RESET:
    ldi R16, 0xFF
    out DDRB,R16

Loop:

    ldi R17, 0x01
aloop:
    inc R17
    cpi R17, 0x00
    brne aloop

    dec R16
    out PORTB, R16
    rjmp Loop