Wall mural in the classroom

So being a senior graduating this year, I wanted to leave my mark on my favourite place in the high school - the art room. So with saying that, I get to paint almost a mural type thing on the wall! So for the past half week I marked off a rectangle, primed it (twice) and today I started my process. I really had no idea at all what I wanted to do so I got some colours ready and I started to mix a magenta with white to form a pink. Just from doing this and making a pastel pink and idea formed in my mind. I would sponge on the wall pastel colours in a sort of pattern and overtop do an intricate black design. Here's from today's work: