I think this film was beautifully scripted. A true Masterpiece of a mastermind. Takes you into the mind of the joker , as we get to see what's inside deep inside his thoughts and his feelings. The musical side of things was the happiness, the only happiness that got him through the dark days. When in reality everything around him was gloom , yet when he closed his eyes, he danceed. We get to see the joker accepting who he is as Arthur. Just wanting others to love him for who he is and who he was but all they saw was the joker and all they wanted was the joker. Living a sad life as Arthur, the joker helped him escape to become someone else. With no one there for him but his thoughts and his dancing and the music , it was all he had to keep him going, and in the end all he wanted was to be Arthur and to be loved.