I've composed a simple melody that has been with me for awhile. I didn't expect much from it, but it's so simple that it's been very easy to arrange. I like listening to it. Unfortunately, it's only a minute long.
To lengthen the piece without adding too much of my trademark monotony, I thought I'd add another theme that has been bouncing around in my head. Last time I remembered the melody, it seemed to fit well despite the different tonality. Of course, now that I'm ready to add it to the song, I can't remember it.
This happens frequently. Melodies come and go. I expect it to hit me again in the next few days. But in the mean time, I'm stuck twiddling my thumbs.