When we gradate the boundaries between two polarized things, the two become smoothly connected. By blurring the various boundaries, we can find complexity, diversity, and richness of information. — Lyrics: Gradation Gradation Gradation Gradation White and black Smoothly 0 and 1 Slightly round and square Gradually The border between them melts blend together Gradation Gradation Gradation Gradation blurring the difference between the two Make the transition more subtle Smooth out the differences The middle increase Connect Gradation Gradation Gradation Gradation