In the night, anda can hear some footsteps outside your window. atau anda probably will hear some knocks on your window. But if anda really want to know if he's visiting anda atau not, anda can just put a bunga selanjutnya to your window. And make sure the window is unlocked and not closed to thigtly. If anda wake up in the morning and the bunga are still fresh, then Peter has come in the evening to replace the flowers. Try to put the bunga anda put are roses. But if the bunga withers, don't give up. Keep believing and don't lose hope :)