How to get the New Years SubEnding in NPCs are becoming smart

Ending difficulty: Easy
Tutorial:
Firstly, talk to Carl and say "Happy new year".
Wait a few seconds then say "Yes" or just say "Happy new year" again
Your goal is to ask all the Groovy Gang.
Once you ask all of the Groovy Gang, you need to fuse the middle firework what Carl the NPC just said
That's it! You got the New Years Ending!
Game: www.roblox.com...
#roblox
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How to use the Carl the NPC's text to speech:
Go to the link: tetyys.com/SAPI4
Select voice to "Adult Male 1"
Select pitch to 128