Abstract watercolor painting with shades of blue, gray, and white.
A sky with gray clouds and a building with a striped roof.
Abstract art with a gradient sky and horizontal purple and pink lines.
A drawing of train tracks extending into the distance, with a cloudy sky above.
Crystallographic structure diagram with black and red atoms connected by bonds, illustrating the atomic arrangement in a material.
Abstract geometric drawing with circles, lines, and dark rectangular bars on a white background.
Abstract drawing with various gray oval shapes outlined with different line styles on a white background.
Abstract black, gray, and watercolor ink drawing with interconnected shapes, lines, and blocks on white paper.