The chant comes from the Red Light, Green Light game in Netflix's Squid Game, which premiered in 2021 and became a global hit. The giant doll, Young-hee, sings the Korean children's game phrase 'mugunghwa kkochi piotsseumnida' while players run toward her, and anyone caught moving when she finishes is eliminated. The scene's mix of playground innocence and sudden violence made the song instantly iconic, and clips of the doll's voice spread across TikTok, YouTube and meme pages. It resurfaced with the show's second season, and editors still use it as shorthand for a deadly countdown.