Where did my idea come from?

My idea came from the film 'Groundhog Day'. This is because this film shows how the protagonist has to relive the same day over and over again until he gets it right. In my short film I want to express a similar message which is that you should be happy because being sad or unhappy does not get you far in life. I want to show that if you are happy and outgoing good things will happen to you and if you are unhappy bad things may happen to you and you will live a boring life.