"Square One" is the debut digital single album by BLACKPINK . It was released on August 8, 2016. The single has a double A-side, "Whistle" and "Boombayah". The lyrics were written by Teddy, Bekuh Boom and B.I from iKON and the music was composed by Teddy, Future Bounce and Bekuh Boom.
In order to promote Square One, BLACKPINK held their debut stage performing "Whistle" and "Boombayah" on SBS's Inkigayo on August 14, 2016. A week later on August 21, the group win their first music program trophy for "Whistle" on Inkigayo, becoming the fastest girl group to achieve this feat.
The music videos for "Whistle" and "Boombayah" were directed by Seo Hyun-seung (director of "I Am the Best" by 2NE1 and "Fantastic Baby" by Big Bang). They were released on BLACKPINK's official YouTube channel on August 8, 2016. The videos went viral soon after they were uploaded, with both surpassing ten million views in five days.