Events. Some things in your life you can predict and plan for(the red "trees" on the left). The power to do it comes from your own experience and self-confidence(the blue ribbon along the lower edge). The events that were unfolded according to your plans boost your self-confidence (the blue space in the upper middle). You don't have any influence on some other events(the green "trees" in the center and right side). You can only get prepared and see what happen. This unpredictability is making the life much more interesting to watch.