Simple tense
It is written in the simple future tense. It is about an event that will happen at some point in the future. The formula for the simple future tense is Subject+will+verb.
Perfect tense is for an event that will be done sometime between now and the future. It follows that formula of Subject+will+have+verb
Progressive tense tells about an action that is ongoing in the future. For example, "The children will be laughing." The children are laughing now and will be in the future."
