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"careful sweetie please don- ow" a man and his grandniece and nephew walked through the forest, on visit with there parents. The older sibling, Mabel sat on top of her great-uncle, or Grunkle as both siblings preferred to call him. Her younger, twin brother, dipper walked behind them, playing with the clip in his hair. The man lifted off his hat, that donned a fez shaped crescent onto his niece's head. It slipped over her eye, preventing her from seeing. She giggled and smiled, before tipping the hat upwards and messing with her Grunkles hair. Her brother started to fall back until he was about ten metres from his family.

"dipper"

the young boy stopped as he heard a voice calling out his named, before walking forward once more.

"dipper"

the voice called out once again. The young boy stopped before looking over his shoulder, trying to locate the voice. "augh! Why you little- dipper?" Stanford pines looked over his shoulder at his young nephew, having noticed that he had stopped. "dipper are you okay?" he asked again, not noticing the small shadow that crept up to the boy. "yeah I am fine Grunkle Stan." He said before watching as his family started walking again.

"dipper, that's right kiddo, now come a little closer," the voice said, watching as dipper slowly moved towards it.

"dipper!" his great uncle cried out, clearly watching as his nephew moved towards the voice. "Grunkle Stan! Watch out!" the boy cried out as a small shadow used weapon to knock his great uncle out. The shadow moved closer until dipper could see that it was bowtie and top-hat wearing triangle.

The triangle moved closer to dipper and his hand out.

"come on kiddo, there is something I want to show you, I think you will like it a lot, just take my hand and we can go, little sapling."

The triangle said. Dipper looked at his great uncle. "who are you, what's your name, why-why are you a triangle?" the now scared young boy asked, as the triangle sighed.

"my name is bill cipher. You can call me bill. I am a triangle because that is just what I am." He answered. Dipper looked at bill, and then his Grunkle, and then bill again before taking bill's hand.

The triangle smiled before pulling out a small black cane and concentrating for a minute before both two were gone.

Stanford slowly started to wake up and look around wildly for his niece and nephew. Spotting Mabel leaning against a tree he rushed to get her. "where is dipper?" he asked panicked. "the triangle guy took him, Grunkle Stan" she said, crying. Stan picked her up and cradled her in his arms before running to the shack to tell the twins parents what had happened.

Upon reaching the shack, both of the two people that where siting in the chairs looked up at Stan. "where's dipper?" the twins mother Ariel, asked. "I don't know. All I remember is turn around to see dipper and then waking up with a pounding head ache. I am so sorry. I'll call the police right away and we will find them. I promise." The conman said looking at both adults.

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Bill and dipper ended up in a large triangle shaped building. It didn't take the young boy long to realize they were no long in gravity falls. "dipper, come here please." Bill said watching as the young boy made his way over to the triangle.

Touching the boys head, he pulled out all his before securing them in a small orb. "this is your new home now, pine tree." He said before cackling evilly.

Hi! Just in case anyone was wondering about this au, it was created by minryll on tumbler. All credit go to them,, I just decided to write a fanfiction for it becomes I couldn't find a fanfiction for it anywhere. Here is what the au s basically about: The Forgotten Falls AU is an au in which Bill returns to Gravity Falls after an indefinite amount of time spent imprisoned within the Statue. Filled with rage, he returns to the past where he was defeated and decides to fiddle with the fate of the Pines family. Dipper is kidnapped at a young age and gets raised by Bill. Mabel stays with her Grunkle Stan to try and look for her brother. 7 years ago, a boy is whisked away by a demon in the Gravity Falls forest. After the disappearance of her brother, Mabel is determined to stay with her Grunkle Stan in order to look for him. Besides having witnessed the kidnapping of her brother, she has no further leads on her brother's disappearance until she's finds a mysterious journal in the woods 7 years later. Meanwhile, after snatching Dipper, Bill Cipher raises the young human child as a weapon with the intention of taking revenge on the Pine's family for ruining his plans for weirdmageddon in a distant timeline, but he gets a bit more than what he's bargained for when he finds himself having to deal with the complexities of nurturing a human child. Whilst being saddled with an occasionally cute meat-bag, he somehow begins to alarmingly care for Dipper.

If you guys want me to continue this, please leave a review. I can update in small chapter more often, or long chapters every so often, up to you guys.