I dreamed that there were many zombies in the villa and asked for a dream.

One of the most striking features of dreams is their intermittent presentation. Dreams are also projections of events in real life. The key to analyzing your dream is to find the projection point of real life, as you said, the piano competition, which is the reason for your dream. Self-confidence will find that your three dreams are all the same, fear, worry, tension and anxiety. This is an unconscious transition from a darkroom to the sea. This kind of tension was unconscious at first, and then I gradually realized it myself. This is a kind of progress and the basis for getting rid of tension. There are many reasons for this dream, maybe it is not ready, maybe it is not confident enough, maybe it is. . . . . Seek more help from parents and friends, learn to relax, and at the same time take time to practice. I believe that you must have a dream after you are confident.