The true happiness is not a privilege of one person.
My own happiness is not a real happiness.
The true happiness, it has to be sympathized with other people.
In this 'add RED: GOLD', which in expresses the true happiness feeling together, the red circle symbolizes a happiness.
The gold circle symbolize that this kind of happiness add and add it makes greate harmony. So that the true happiness of one person can add other people's happiness.