The Balance-Imbalance Rule or what some people call asymmetry is that you basically need to have everything in the room have complete balance, and then just throw off the balance with one or two elements in your design. In the example pictures directly to the left, everything in the room is completely balanced, there are chairs on the right and left, the TV and table are positioned in the middle, and the support beams at the back add great balance to the picture. Here, however, the balance was thrown just a little bit into imbalance by making part of the back wall pink, and having the green plant in the back as well. What this does for your design, is it creates curiosity. Your brain loves completion and sense and when it is thrown off a little bit, it becomes very interested and intrigued. That is why this design rule has so much power.