"Write What You Imagine." It's really hard to write a story without having an Idea or u're lacks of imagination, even though u may have idea to come up with but you are having a hard time where to start with. That's the feeling I am right now. Mental Blocked do really exist, sometimes it's so rare for me to write half of a chapter, i do revisions a lot when it comes to plot. So be strong, and have patience with your work. It will be worth of your time. Believe in yourself and your work!