Hey! We had five days off of school because of a snow storm, and I'm trying to pass the time. Here's a little fic, it's a little dark, but I don't have enough dark fics :)

There's gonna be typos, I promise (I suck at proof-reading)

I don't own Gravity Falls!

It was a beautiful evening in Gravity Falls, the sky a gentle shade of orange and pink as the day came to a close. Mabel was in her bedroom, aka a musty old attic, knitting a sweater to match the sky she so admired. Her wooden knitting needles danced around, creating beautiful patterns and designs.

Grunkle Stan was away, pug trafficking with Soos. While Dipper was...who knew. Mabel paused her work, her brow furrowing with worry. When did he leave?

She shrug, assuming he was probably outside attracting mosquitos. He'd better get his chance, the sun would be setting any minute.

Mabel continued her work, humming to herself as she heard the door downstairs slowly creak open. Mabel perked up, not looking up from her masterpiece. Maybe it was Dipper, she hoped.

"HEY DIPSTICK, COME'ERE!"

Nothing.

Mabel suddenly began to feel a wave of uneasiness, but dismissed it. What was there to be nervous about?

The girl with the braces tensed up again as she heard a pair of footsteps climb up the stairs very slowly, each step making a loud creak.

CREAK...CREAK...CREAK

Mabel stopped her work, throwing her needles onto the ground. Who would walk up the stairs so slowly? Grunkle Stan? Nah, he'd be grunting and complaining the entire time. The creaking grew closer, strangely making Mabel tense.

"Don't be such a baby, Mabel."

"YEAH, DON'T BE SUCH A BABY!" A familiar voice screamed. A Dipper-shaped shadow darkened her doorway. Mabel looked up and yelped, her brother stood at the front of her room, his posture full of confidence and his eyes yellow and illuminous.

"BILL!" Mabel jumped off her bed in fright, "BIPPER!"

"I LIKE BABIES, ESPECIALLY DEAD ONES. SPEAKING OF BEING DEAD, IT'S TIME FOR YOUR APPOINTMENT WITH THE GRIM REAPER!" Bipper gave her an awful full-gummed grin, "I'D BANISH YOU TO ANOTHER DIMENSION, BUT FIGURED, HOW FUN WOULD IT BE TO HAVE ONE TWIN KILL THE OTHER, HUH? AHAHAH!"

Mabel retreated towards the triangular window, the sunset seeping in, making the entire room a warm yellow.

"STAY BACK!" Mabel put up her fists, "I'LL, I'LL-"

Bipper staggered closer to her, he was obviously out of practice when it came to controlling a human body, but he didn't need practice, Mabel knew he could still tear her apart.

Mabel leaned as far back as she could on the window, her heart numb in her chest. She had no idea would she could do to escape this, no matter would Bill could take her.

Bill's yellow eyes seemed to grow larger as she approached her, giving her a full-gummed smile.

"ONE TWIN STRANGLES ANOTHER, IT'LL BE-" Bipper finally came close enough, grabbing her by the neck, "SO DELICIOUSLY DRAMATIC!"

Bipper thrusted her by the the neck downwards, away from the window. Mabel landed on her head, her temples throbbing. Mabel tried to get up, but to her horror everything was spinning around. Her head was throbbing like a bomb about to explode.

Concussion, she concluded.

Bipper took his foot and stepped on her head, forcing it to slam onto the ground again. Mabel clutched her stomach, screaming bloody murder. She gave a final attempt to stand up, resulting in a kick in the chest. Mabel's body smashed onto the floor for a third time, now on her back.

Bipper didn't take a moment to hesitate, as he sat ontop of her body, placing a knee on her neck to suffocate her. Mabel gagged, the pressure made it feel like her eyeballs were going to pop out of her head.

"POOR MABEL, A DEFENSELESS BODY OF FLESH! IF I CAN KILL YOU WITH THIS WEAK BODY I'D HAVE NO PROBLEM TEARING YOU APART IN MY TRUE FORM!" He pressed his knee harder onto Mabel's neck, laughing as she sputtered for air.

Red blotchy spots started to dance in front of her, as the murderer above her became blurry and distorted. His yellow eyes laughed at her, seemingly glowing brighter and brighter by the second. Mabel swung her hands around, flopping them like a pair of fish out of water. Tears swam down her cheeks, as she felt something long and wooden in her grasp.

She couldn't see anything but red and yellow spots and couldn't breathe, but without hesitation she picked up the object and stabbed it forwards.

She could hear Bill's tortured scream as she finally felt his weight off her body. Mabel let go of the object, her strength drained as she brought her hands gently to her throat, coughing, heaving and sputtering.

The entire room spun around rapidly, spots still hopped around in her head, but not enough to not see what was going on. The bright orange sun was setting upon the town, and as Mabel regained her vision she could see the wavering sun sink deeper and deeper into the trees. Her chest may as well been filled with boulders, her neck throbbing erratically. She crawled closer to the triangular window, too scared to attempt to stand, hoping the sunset would calm her nerves.

Where was Bipper?

Mabel assumed that Bipper got so scared, he ran out of Dipper's body like a scared little baby! Still, a sinking feeling in her stomach told her it was too good to be true.

"Dipper?" Mabel pushed up off the floor to get on her knees, wobbling like she was about to fall over. She scooted around, inching closer and closer to where she remembered the fight was.

Dipper's body was sprawled upon the wooden floor, his limbs stretched out like a starfish.

"Dipper!" Mabel got closer, "I think Bill might be gone, look at me! Di-"

She got a closer look, and saw a pool of blood dripping out of Dipper's eye and staining the floor. Inside Dipper's right eye was a knitting needle, standing up tall and straight like it was a flag implanted in the ground.

Blood gushed from the wound like a waterfall, pouring down his cheeks onto the floor. His right arm twitched a few times, like a dying animal, then stopped.

"DIPPER!" Mabel screamed, using all her strength to stand upright. "DIPPER, NO!" She stood over the body, unable to keep her eyes off the knitting needle poking his beautiful brown eyes. It was like stabbing an egg yolk, once you did, all the goo gushed all over the place and his eye was mashed.

And Mabel did it.

She knew she did.

"Mason. MASON!" Mabel erupted into a fit of sobs, her frame shaking as she embraced herself.

She killed her own brother. Her only brother. What would she do? They'd see her as a murderer for sure, she'd be taken away from her family, from everyone!

She then thought of what Bill said to her before he tried to kill her.

"HOW FUN WOULD IT BE TO HAVE ONE TWIN KILL THE OTHER, HUH? AHAHAH!"

Mabel sobbed, Bill won. It wasn't the way he planned, but nevertheless one twin did kill the other. She had done exactly what Bill had wanted.

Mabel knew what she had to do. The tween grabbed her favorite possessions, including her grappling hook and Journal #3, and threw the chair by her desk out the window, shattering the triangular window.

Mabel looked towards her pig, Waddles, who had strangely slept through the entire fight. He was curled up on her bed, still dreaming.

Mabel thought about taking him, but with a heavy heart, dismissed the idea. If she ever got caught, he'd be taken somewhere awful, like a meat factory.

"I'm sorry Waddles," she whispered, as she attached the hook to the bottom of the window, "I have to go." Mabel figured Stan would be home any minute, she couldn't risk being seen.

Grappling hook in one hand and her prized possessions under her arm, she lowered herself out the window and onto the cool grass, running into the night while blinded by her own tears.

The final glimpse of the setting sun submerged into the trees, making the world pitch black.

A/N: Hey guys! Sorry about that, we had five days off of school cause of snow, I was bored out of my mind. Thanks for reading, comments are appreciated! I don't know if I'll continue or not, so I left an ending that'll be good to build off of.