One of my first board designs also happens to be one of only a hand full I designed in Fritzing.
Been working on a new project? Have everything working and now you want to transfer that new idea to it’s own board so you are not using up your arduino?
While brainstorming ideas the other night. I found a few threads online saying how the default behavior of Optiboot to flash the led residing on Arduino pin D13 could cause things to act randomly when using this pin as a output to control something like a relay.