Start with the hidden story. What’s the underlying message you want to get across? Maybe you want to explore a historical event, or express your opinions about a moral idea. Figure out what your topic is and what you want to say about it.
Break the hidden story down. What are the most important characters or aspects of the hidden story? These will become the main characters, settings, and events in your allegory.
Pick a theme for the surface story and find correlations. The surface story should be very different from the hidden story. Science fiction and fantasy work really well for this purpose, as they give you free reign to invent a world that suits the hidden story perfectly. Then come up with characters, etc., to cover all the main elements you listed in Step 2.
(Literary Terms, 2016)
5 Tips for Using Allegory in Writing
Think of an important idea you want to share with your reader. It should be something large and complex, and something that relates to the society you live in on a large scale.
Once you’ve decided on a topic, plan out your allegory. Think of how you will translate these real-world ideas into fictional scenes and characters. Carefully assign characters: animals are common, as in Aesop’s Fables and Animal Farm, but there is no rule about what sort of characters to use.
Whatever you choose, remember that your audience will be trying to figure out who each character represents in real life, so try not to confuse them with unrelated characters whose purpose is not clear.
Be sure to let your reader know how to read between the lines. You will need to leave clues without over-explaining your message. Don’t be so subtle that the readers will miss the point of the allegory.
The surface story must stand on its own. While the underlying message can be a bit abstract, this isn’t an essay or a speech. The top layer must still make sense and be intriguing in its own right.
(MasterClass staff, 2021)
Another head hangs lowly Child is slowly taken And the violence, caused such silence Who are we mistaken?
But you see, it's not me It's not my family In your head, in your head, they are fighting With their tanks, and their bombs And their bombs, and their guns In your head, in your head they are crying
In your head, in your head Zombie, zombie, zombie-ie-ie What's in your head, in your head Zombie, zombie, zombie-ie-ie, oh
Do, do, do, do Do, do, do, do Do, do, do, do Do, do, do, do
Another mother's breaking Heart is taking over When the violence causes silence We must be mistaken
It's the same old theme Since nineteen-sixteen In your head, in your head, they're still fighting With their tanks, and their bombs And their bombs, and their guns In your head, in your head, they are dying
In your head, in your head Zombie, zombie, zombie-ie-ie What's in your head, in your head Zombie, zombie, zombie-ie-ie Oh oh oh oh oh oh oh, ay, oh, ya ya