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