Disclaimer: Tolkien's the genius, not me.
Darkness reigned above the plains and waters of Arda. As Aulë and Ulmo and others turned their attention to shaping the earth itself, Varda looked to the empty skies. She flung the stars like diamonds into the darkness. They filled the world with soft silver light, making the dewdrops and springs of Ulmo sparkle, and Yavanna’s leaves shivered and cast dancing shadows as Manwë’s breezes caressed Arda’s surface.
The last stars Varda hung were a warning, the shimmering Valacirca, that all may see the silver sign of the Sickle of the Valar and know of that they were not idle.