empty blue light weird on the tile floor

"Your fate awaits outside the door"
Said the strip in the Chinese Fortune Cookie at the office
Strange knock--at the door?
Open the door once--nothing
Close it--stir the soup--back to the poem I am trying to understand
Strange knock again--is it really my door?
Fumble with the lock, checking it, tugging
Door open--no one--but empty blue light weird on the tile floor

[Elise Cowen, '"Your Fate Awaits You Outside the Door"', from Poems and Fragments]