She talked about it on Icelandic radio today.
During the making of the new album, Björk listened to beats that she feels move like a virus, that are still but moving at the same time. "Most of the songs I've done are 80-90 beats per minute and there is a rather boring reason for that, it is that when I walk I walk at that speed. But on this album it's chill in the first half of the song and calm but when there's one minute left the song turns into a club. Just for a minute" says Björk.
[She claims the music is] ideal for a COVID party, which were small while meeting restrictions were strict. "For people who are making clubs at home in their living room, restricted to their ‘Christmas bubble’" she says. "Like a man who was headbanging, then sat down again and had another glass of red wine, and everyone is home by ten o'clock, done with the dancing and everything."