Day 4 prompt was "Knot" and I was reminded of an informal celestial navigation lesson I sat in on back in high school. The day I sat in, the lesson didn't include anything about actually navigating by the stars; instead we learned to make monkey fist knots like this one:
Day 5 prompt was "Raven". I considered just a black frame, or a portrait of my friend's dog Raven, but ultimately I decided to just go for the bird :D