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Digital Arts
Line is one of the simplest and most basic aspects of art, but it can also contain a lot of emotion. Use lines to demonstrate visually how you're feeling....
Art example: Each Line One Breath,
http://www.thisiscolossal.com/2013/08/john-franzen/
Lines can have a purpose, to give order, direction, security. A sense of belonging.
Perhaps even if misused, for communicating.
For its own sake, just to be there, to exist with strength.
Purpose?
Purpose to confuse - see behaviour of cellar spiders.