system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How are fireworks made to go off in particular shapes like hearts?
gpt
You place the stars (burning points of light made of various chemicals) in the shape that you want, surrounded by black powder. black powder goes boom and puts an equal vector and amount of force on each star as the casing explodes and releases these burning stars into the air. If the shape is a heart, the stars are placed in a heart shape on the same plane within the sphere casing of the firework. Too lazy to find you diagrams. Let me know if that description isn't clear.

keep your stick on the ice.