Question
What do i do when bloom is done.

Deadhead? is the black a seed pod?

Answer
Hi Teri,
Thanx for your question.  When the lilies are finished blooming, you can deadhead them so they don't try to make seed pods.  This saves the plant a lot of energy that it can continue to send to the bulb for next year's bloom and growth.  The seed pod will be green at first and is usually like a 1"/2.5 cm long capsule that will eventually turn brown and start to split open.  Seeds will be papery and flat and roundish.  I hope this helps.
Tom