电脑


screen             keyboard           cpu            disk


上下左右移动，但是只在关键词间跳动，永远保证关键词在屏幕中间，像nes_mario一样移动画面。pure_text in terminal.

当左右或者上下没有更多关键词时，显示“create_new_one?”，if user hit enter, start to add new node keyword.

Save as a pure text where keywords get splited by ",".

You can even convert "\n" as "\\n" to allow each keyword has multiple lines text.