In the past two decades, the growing rage of computer mediated environments (CMC) affords new literacies and new opportunities for language learners to experience, construct, communicate, and access knowledge (Ware, Kern & Warschauer, 2016). Also, it suggests that writing in multimodal in the digital ear contributes to its production and interpretation (Canagarajah, 2013) and can be particularly beneficial for L2 learners' writing practices (Elola & Oskoz, 2010) such as writing quality (Stroch, 2005), writing fluency (Bloch, 2007), academic voices (Sperling & Appleman, 2011) and a sense of audience (Sun & Chang, 2012). Google Docs and online text-chat systems are prominent collaborative tools for group writing, and the result shows that the focus group displayed a mixed-interaction pattern, a collaborative pattern in two online text-chat systems, and a more dominant-passive pattern while co-constructing the text. They study also explored that changing the mode of communication from Line to Google Docs chat-room appears to have led to an increase in the participants' interaction and communication and seems to have facilitated collaboration. Participants make a significant contribution of two types of writing changing functions, adding and correcting in the text and make revisions to their text.