Yes it has to take a rest every once in a while read this post about voting power, might be useful to you too! https://steemit.com/steemit/@scrooger/voting-power-101-how-to-vote-when-to-vote-when-to-stop-simple-and-easy-explanation

The line picture is basically just a small thin picture that looks like some sort of line. SO you need to get/make a long thin picture and use that in your posts. In my post its the many horizontal dots.