Why did bee gees drummer play behind dark screen?

The Bee Gees' drummer, Colin "C. J." C. Gibb, often played behind a dark screen during performances to maintain a level of anonymity and focus on the vocal harmonies and musical dynamics of the band. This artistic choice allowed the spotlight to remain on the iconic vocal performances of Barry, Robin, and Maurice Gibb. Additionally, it created a unique visual aesthetic for their concerts, emphasizing the overall experience rather than individual performers.