What happens next in this paragraph?

He is wearing headphones as he drums a beat on the drums. He continues playing the drums. After a while he changes the beat after pausing for a little time. then
Possible answers: -- he starts to really beat the drums same as he is playing.; -- quickly back to playing the drums.; -- he just a short while affects up speed as he continues playing his song.; -- continues playing another beat on the drums.;
continues playing another beat on the drums.