Write something intricate
This is a vague one. Open ended. You're free to explore what intricate means to you, or define the way you'd like to be intricate before you start writing.
You could think of it as detailed, lush, interlocking parts - like if you played single notes only on guitar and kept stacking them.
Or you could think of it as an intricate chord progression, where you're focused on specific voicings of each chord - maybe the progression itself is a detailed story. Maybe the melody and chord progressing interlock in some intricate way.
The dictionary definition of intricate is "very complicated or detailed."
You could focus on lyrics that are detailed in some way or complicated. The idea is that some element of your creation feels intricate.
Antonyms of the word include "simple, easy, straightforward, plain, direct"
Having said all that, not every part of your creation needs to be intricate, just a part or concept of your choosing. Have fun and post what you write on the community forum!