Periscope is currently testing a brand new feature that allows you to draw with your finger on top of a live video feed, The Next Web reported today. You can pick any color to draw with by tapping on a live video feed or use the new selection interface to draw in three primary colors.
Facebook too is working on ability to draw on video as part of the Facebok Live features so we're not surprised that rival Periscope, which is owned by Twitter, would work on this.