A muralist is someone who paints big pictures on walls or other big surfaces. They use lots of colors and brushes and take a long time to finish their work. Muralists usually want to show something that's important or beautiful. They might paint pictures of people, animals, or landscapes. Sometimes they even tell stories with their murals! A mural can make a boring wall look really interesting and pretty. It can also make people happy when they look at it. So, a muralist is someone who makes the world a more beautiful and colorful place!