My Spring Diary (Min Forårsdagbog) - Piano Pieces Vol. 2 by Karl Aage Rasmussen.
In this, the second volume of My Spring Diary, which depicts the progress of the day from afternoon to night, the technical difficulties are generally greater than in vol. 1, and all the pieces are for piano solo. Freer use is made of the various types of notation which were introduced in the first volume.
The 8th piece (“Day’s End”) uses towards the end the type of notation called “open form”. The piece is a kind of musical resumé of the whole collection – elements of the earlier pieces reappear and at the end of the piece the performer can exercise control over the way in which these elements are combined. The sequence of the individual groups is free, and it is not obligatory to play all of them. The only limitation is that the arrows within the individual groups must be followed and that the piece should end with the short passage marked “conclusion”.