The color is hideous enough, and unreliable enough, and infuriating enough, but the pattern is torturing.
Your think you have mastered it, but just as you get well underway in following, it turns a back-somersault and there you are. It slaps you in the face, knocks you down, and tramples upon you. It is like a bad dream.
The outside pattern is a florid arabesque, reminding one of a fungus. It you can imagine a toadstool in joints, an interminable string of toadstools, budding and sprouting in endless convolutions--why, that is something like it.
That is, sometimes!
There is one marked peculiarity about this paper, a thing nobody seems to notice but myself, and that is that it changes as the light changes.
At night, in any kind of light, in twlight, candle light, lampshade, and worst of all by moonlight, it becomes bars! The outside pattern I mean, and the woman behind it is as plain as can be (Charlotte Perkins Gilman, "The Yellow Wallpaper," 25-26).