Zodiac

The Wheel of Intrigue is a symbol briefly flashed at the end of the Gravity Falls Main Title Theme.

Background
Appearing since the first episode, the Wheel of Intrigue has appeared in every single episode of the series. When it is shown there is a fast whisper that reveals the code needed to translate the cryptograms seen at the end of the episode.

Appearance
It appears to be drawn on a page from one of the journals. The paper has various symbols, writing, and other content written on it including a phrase which can be deciphered with caesar cipher and reads "STAN IS NOT WHAT HE SEEMS."

The Wheel itself is a large circle in the middle of the page. The center of the circle contains a drawing of Bill Cipher, and around the circle are ten small images that have been seen throughout the series.

These images and their placements include:
 * A pair of glasses - Carpet Diem
 * A question mark - Soos's tee-shirt
 * An open bag of ice - The Inconveniencing
 * A crescent shaped symbol - Stan's fez
 * A pine tree - Dipper's hat
 * A crossed, five-pointed star with an eyeball in the center - the figure on the top of the Tent of Telepathy
 * A hand with six fingers - the hand tracing scene on all three of the journals
 * A llama - one of Mabel's sweaters
 * A shooting star - one of Mabel's sweaters
 * A heart with a stitch in the middle - Robbie's sweatshirt

Trivia

 * The crescent symbol was originally different but it changed when the symbol on Stan's fez change.
 * The llama on the wheel is facing in the opposite direction as the one on Mabel's sweater