I tried to find the Berlioz Symphonie Fantastique, but couldn’t, so instead here’s the third movement of Frederick Chopin’s Sonata No. 2 in B-flat minor (Op. 35), also known as the “Funeral March”, and performed by the guy you’d expect to see working in the local funeral home.
Now, what you can do is load this video and play it any time trick-or-treaters come by, to help set the mood. In any case, have a happy Halloween.