First, you need to be really familiar with the Homestuck universe and its characters. Understand their personalities and the overall storylines. Then, come up with an interesting plot that fits within that world.
One must - read Homestuck fanfic is 'Abandon All Hope'. It offers a really interesting take on the Homestuck universe, exploring the characters in new and exciting ways.
I'm not entirely sure as I haven't read it specifically. But generally, a Homestuck fanfic with '4chords' might be related to the Homestuck universe and perhaps use the concept of 4 chords in music in some way within the story. Maybe it's about a character's journey in the Homestuck world and the music (represented by the 4 chords) plays a role in their development or experiences.
A good plot could involve a villain from the Homestuck universe creating chaos in the Avengers' world. The Homestuck characters come to help, but there are misunderstandings at first between them and the Avengers. However, as they start to understand each other's powers and motives, they form a strong alliance to defeat the villain.
A 'bright homestuck fanfic' often has positive themes. It might focus on friendship and growth among the characters. For example, characters may learn important life lessons and become better versions of themselves.
First, you need to have a deep understanding of the original Homestuck universe and its characters. Know their personalities, motivations, and relationships. Then, come up with a unique and engaging plot that fits within the Homestuck framework.
One great 'Homestuck Naruto' fanfic is 'Naruto in the Homestuck Universe'. It has an interesting plot where Naruto is suddenly transported into the Homestuck world. He has to adapt to the strange rules and characters there, while still maintaining his ninja spirit. The interactions between Naruto and the Homestuck characters are really well - written.
I'd recommend checking out 'The Adventures of Nepeta and Equius' on Archive of Our Own. It has a great plot that really brings out the best in both characters.
One of the great things about Nepeta x Equius fanfics is the potential for character growth. We might see Equius becoming more in touch with his emotions through his interactions with Nepeta. And Nepeta could also learn about boundaries and self - control from Equius. Fanfic writers can take these two characters in many different and creative directions in their stories.
The theme of self - discovery also pops up a lot. The male characters in the yaoi fanfic might be on a journey to understand their own feelings and sexuality. It could be related to their experiences in the Homestuck universe, like dealing with the challenges they face in the game and how that affects their relationships with each other on a more personal, romantic level.