For any number or combination of players. Everyone works through the sequence at their own pace, moving on to the next bar when they feel they have explored the previous one fully. The notes may be played in any register at any speed. Repeat each bar/grouping as many times as seems right. When each player reaches the final D they hold it until everyone is there, then all crescendo and finish.
Two variants are below. They use exactly the same sequence of notes (derived from the keys of Haydn's symphonies). Both variants may be performed simultaneously. Other variants may be devised and played with or without others. The "chords" in Variant 2 are not intended necessarily to be sounded together, though they may be, in part or in full, as the performers please.