We have to do a myth about a natural phenomenon. I did mine about Poseidon getting bad at two teenagers for throwing litter into the ocean.

A long time ago in the small town of Homewood there were two teenage boys named Rhett and Link. They were always getting into trouble. They would lie, cheat and steal. One day, they decided to have a picnic by the ocean. When they finished, instead of throwing their leftovers in the trash can, they threw it in the ocean.

"Sire! Sire!" The servants busted through the door, "There is an abundance of trash being thrown into the ocean!"
"What," yelled Poseidon as he stood up from his throne. "It's true! The seahorses have reported that most of the trash is coming from Homewood, Germany."
"Tell me more, "bellowed Poseidon," who are these people?"
"Two young boys that go by the names of Rhett and Link."
"Well," Poseidon began,"since they are young, I will give them one more chance."

The next day, Rhett said to Link, "Want to have another picnic?"
"Sure," Link replied.
The following day, Rhett and Link packed up food to eat, and drinks to drink. Again, instead of throwing their leftovers in the trash, they threw it in the ocean.

"Poseidon! The boys have done it again!" Poseidon said, "That was their last chance and now they will suffer the consequences."
"what will you do," the servant said.
"They will feel the wrath of the great god, Poseidon!" His eyes began to glow a bright blue, he stabbed the ocean floor with his scepter as he said, "Release the great tsunami!" Just as Poseidon said those words, a giant tsunami hit the coast of Homewood.
Meanwhile, in Homewood everyone began to see the ocean rise up. "What's happening?" said Link as water started to pile up below them. "A tsunami is happening," Rhett screamed back. Everyone began to run as far as they could from the ocean. The water kept coming faster and faster and then Link saw that the water had plenty of trash as it came towards them. Minutes passed and the tsunami seemed to have died down. "Why would this happened to us, we've done nothing wrong!" yelled Rhett. "Think about it," Link began, "didn't you realize how much trash there was as the water came?"
"Maybe it was a god's way of telling us that dumping trash in the ocean isn't right."
"Poseidon, perhaps?" asked Rhett.
"I think so too, but we have to find a way to let Poseidon know we understand his message and we'll stop littering."
"At night, lets go to the remaining of the ocean and tell him."
So, when it was night time they began to say they learned their lesson and they won't litter again. Then, both of them waited for a sign to know Poseidon heard them.
Nothing happened.
They decided to leave and just wait awhile. Days, weeks, and months passed still no answer, but nothing bad has happened ever since they kept their word.

Is this good? Are there any punctuation mistakes or any I need to add?

Your story about Poseidon getting angry at two teenagers for throwing litter into the ocean is an interesting myth. However, I noticed a few punctuation mistakes and suggestions for improvement:

1. In the sentence, "One day, they decided to have a picnic by the ocean," it would be better to replace the comma with a period, making it a new sentence.
Example: "One day. They decided to have a picnic by the ocean."

2. In the dialogue between Rhett and Link, use quotation marks to indicate the speech.
Example: "Want to have another picnic?" Rhett said to Link.
"Sure," Link replied.

3. When describing Poseidon's reaction, you can use more descriptive language to bring out the emotions.
Example: "Poseidon exclaimed, standing up from his throne in anger."

4. In the sentence, "Since they are young, I will give them one more chance," it would be better to start a new paragraph after the comma for better readability.
Example: "Since they are young,
I will give them one more chance."

5. When describing the tsunami hitting Homewood, you can use more vivid language to enhance the imagery.
Example: "Just as Poseidon said those words, a colossal tsunami crashed upon the coast of Homewood, with massive walls of water and swirling debris."

6. In the dialogue between Rhett and Link during the tsunami, use quotation marks and capitalize the first word of each sentence for consistency.
Example: "What's happening?" said Link as water started to pile up below them.
"A tsunami is happening," Rhett screamed back.

7. When Rhett and Link reflect on the situation, consider using apostrophes in contractions for better grammar.
Example: "Why would this happen to us? We've done nothing wrong!" yelled Rhett.

8. In the sentence, "Think about it," Link began, "didn't you realize how much trash there was as the water came?," it would be better to replace the comma after began with a period and capitalize 'didn't' for proper punctuation.
Example: "Think about it." Link began, "Didn't you realize how much trash there was as the water came?"

Overall, your story is engaging and conveys a moral message about the consequences of littering. By making these punctuation and grammatical improvements, your myth will become even more readable and impactful.