After undergoing personal tragedy, artist Josie Lewis started obsessively painting geometric patterns in watercolor as a way to self-medicate and process her grief. The effect of meditative, repetitive painting led her to study the science of creative flow (pioneered by psychologist Mihaly Csikszentmihalyi.) Flow causes temporary, physical changes in the brain, notably a disruption on how the “executive”, the prefrontal cortex, functions. As Josie immersed herself in flow via watercolor painting, she also began to film her process and her timelapse videos went viral on the web, gaining more than a billion views—and offering a mini flow experience for her viewers.