Illustrations for proglib.io

The following set of illustrations has been prepared for proglib.io website. Illustrations correspond to two types of tasks: a) covers of articles on various topics related to programming, b) illustrations of logical and algorithmic puzzles. The aspect ratio 2:1 was set by the design of the website. Every day proglib.io publishes one or two articles. To emphasize the abstractness of the information two main techniques were used: the contour drawing and the watercolor style.