LINES

 this one isnt the best example of "lines" but if you take a closer look it is. the lines just arent all in one direction

 same with this one! without even knowing it when you see this picture the first thing you think of is LIIINNEEESSS. trust me bro.

 this is a better example of lines as they are all in one fluent motion! ... or are they... take a closer look! the lines seem to be moving in one directions but believe it or not, the flow of the lines creates different lines all together!

 lines, or no lines? many lines, or one line? you be the judge. this one's up for interpretation.
(but there are lines, believe me)

this is not a picture depicting a small skinny REGULAR line, but a large intricate line not even worthy of this blog page. its got it all, folks: small lines, big lines, circles, everything needed in a line picture. feast your eyes and enjoy!