Step 6: Installation, testing, and completion.
I used a USB battery which should offer plenty of run time for such a simple circuit. An artificial pumpkin, hobby knife, and hot glue did the rest.
Be very careful with your wiring as too much tugging can yank the wires out. There should be no harm done in leaving the circuit running while going through the hot glue and installation tests.
Below are two videos of the pumpkin in action: