Twenty-five-year-old Ryan Epp used his programming chops in 2014 to set up a Twitter bot that perpetually trolled SEPTA using its own service notification tweets.

At least it tried to, until SEPTA blocked the account in August 2015.

But putting transit to shame was only a side gig for the Lancaster County-native, who had moved to Seattle to do his development thing at Amazon.

In January, Epp quit his job and moved to Media, Pa., to develop what is now Yarn, an interactive fiction platform for readers, writers and game developers released last Thursday for iOS.

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