It is an interactive Typeface design，letter A can move and change the following human movement and human emotion. it was inspired by a question that how the technology responds to human emotion and human behaviors in the digital world. Nowadays, people are all living in a digital world. people are writing and reading through technology. Due to social media, everyone becomes a broadcast. everyone can post their words online and express their emotions as well. So technology has given a platform from human being to show their rights and personality. A famous writer said that "the new book needs a new writer" . I realized that new media like social media need new Typeface design. so I design that letter A is living as a human being. However, social media has also shaped typeface. so I made installation as a screen that can shape the letter physically represented people's criticism and judgments. The interactive typeface likes a human living in social media and also suffering from social media.