Answer:
[Lane is arranging afternoon tea on the table, and after the music has ceased, Algernon enters.]
The room is luxuriously and artistically furnished. The sound of a piano is heard in the adjoining room.
Explanation:
A stage direction can be anything describing what happens onstage. It might be where actors should be moving, how the scene should be set, or how a line should be delivered. It will usually be in brackets/parentheses/quotations, so something like [Enter ROMEO].