I always have two or three projects on the back burner that I dip in and out of between paid assignments. Fifty faces is one of them. Essentially the idea here is just to have fun - no concepts, no point to get across or text to interpret, just fifty different faces. This is the pencil stage, ringing the changes with each one and avoiding repetition as far as possible. Then working them up, A4 size, in different ways - acrylic, pen and ink etc. Working quickly to avoid getting bogged down or bored.