These drawings, one an animated GIF, are by Ric Carrasquillo. Carrasquillo works in a combination of traditional (ink and gouache) and digital techniques. He is a cartoonist and illustrator from San Francisco, U.S.
With bold brush strokes and relatively few lines, Carrasquillo is able to create very expressive pictures. I particularly like the animated drawing, which I think perfectly captures the feeling of having too many thoughts in my head at once!