This is a mix between Days 1, 3 and 6. I tried a few different pens (broad nib, brush pen, round tip marker) but found I really liked the uneven texture and edges created from the concentric circles method I used in Day 1. I could definitely spend time trying to perfect the curves on this but it has a nice vibe.

Day 6: Add Color

Day 5: Shrink or Stretch

Day 4: Something Weird

Day 3: Fill the Frame

Day 2: Play with Weight

Day 1: Monoline