art, cat, happy, design, illustration, cats, night, blue, drawing, kitten, digital, nice, tired, sleep, dream, sleeping, sketch, sleepy, lazy, dreams, artwork, content, goodnight, nap, dreaming, exhausted, busy, asleep, cozy, feline, line drawing, whiskers, purr, comfy, emma darvick, so tired, do not disturb, cat nap, don’t bother me, line work