Add fadeOut effect for stopping fireworks

[hypebright]

Closes #1 - thanks @laresbernardo

[laresbernardo]

This is amazing. Exactly what I proposed! Thanks so much.
Small feedback/question here: not sure if lazyeval (...) could be enabled here as a parameter so that users could leverage the underneath solution and set parameter inputs as they see fit by passing list(...). Just food for thought.