gravity falls oneshots and stuff

A weird door in grunkle ford's basement.

Third person

It had been a year since the demon called bill cipher had been defeated by the pines. Dipper and Mabel were now 13 and back in their small, weird town. 
“Grunkle stan! Grunkle ford! I've missed you” mabel exclaimed, hugging the older twins. 
“We've missed you too, kid” Stan said. Mabel started to tell Stan all about here year and what she'd been up to. Mabel hasn't changed a bit. 
“Dipper! It's nice to see you again” ford said, dipper was wearing grey jeans with a blue hoodie instead of his jacket and shorts. But he still had his pinetree hat, which Wendy had sent over to him. 
“Nice to see you again to grunkle ford” dipper said. 
Later that night dipper and ford were in fords lab, ford was showing dipper his new invention. 
“That's so cool grunkle ford” dipper said, he wasn't actually paying attention to his grunkel. Instead he was looking at a door in fords lab. It had 3 looks and looked magic proof. He’d sware he heard bangging on it a few seconds ago.
“Grunkle ford? What's behind that door?” dipper questioned. Ford shook his head. 
“Nothing important dipper, i think you should be going to bed now” ford said, dipper narrowed his eyes. ‘Grunkel ford’s keeping something from me’ he thought. 
“Ok, i'll see you in the morning,” he said before leaving the lab. He rushed upstairs to his shared room with mabel. 
“Wow, dipper what's gotten into you?” Mabel joked as dipper burst into the room. 
“Mabel, grunkle ford has this magic proof door” he said, “he's keeping something from us, it has 3 looks so it has to be dangerous. What if whatever is inside gets out?” he questioned. 
“Wow, dip, calm down. Mabels on the case!” she exclaimed. “When grunkle ford falls asleep, he has to sometime, we can go and see what is inside of that door” she said, dipper nodded. The rest of the night dipper and mabel talked about what they think was inside. 
“For the last time mabel, if it was a vampire i'm sure grunkle ford would of told me” dipper said, 
“Is definitely a vampire” she muttered. Dipper rolled his eyes at his sister. He looked at the clock, it was now 2am. 
“Mabel it's time we go'' he said, getting out of bed. Mabel followed him down stairs. Stan was still awake, watching tv. 
“What are you kids doing up this late, is it late or early, whatever… why are you up?” he asked, porzing the tv.
“We're going to investigate this weird door in Grunkle ford's lab,” Dipper said. 
“Ok, be careful” Stan said. Dipper was surprised that stan was letting them do this but then again this was stan he was talking about. 
When they finally made it to the lab, Ford was asleep on his desk. 
He went over to ford and saw some keys, 3 to be exact, on the desk next to him. He grabbed them and walked over to the door, which Mabel was standing by. 
He opened the looks. 
“Are you ready to find out what's inside of here?” he whispered to mabel. 
“I'm sure it's a vampire!” Mabel giggeld. 
Dipper pulled the door open and inside layed… a kid, around the same age as dipper and Mabel. He had a yellow shirt, which seemed to be covered in blood and some black trousers. The boy was covered in cuts and bruises and was unconscious. He also looked very skinny and his shirt was way too big for him. He had some kind of collar on him, it looked like a shock collar. 
“What the heck!?!” dipper shouted, looking at the small kid. 
Ford had woken up by now, and walked over to the twins. 
“I didnt think youd find out so soon,” Ford admitted, making the twins jump. 
“Who is he grunkle Ford?” dipper growled. 
“That is Bill Cipher,” Ford told them. “After weirdmageddon he came back, he was human, so i decided to do some tests on him” 
Bill was now awake and was sitting up. 
“What now sxter, are you going to do more of our weird tests on me?” he muttered. He hadn't seen dipper or mabel yet. Dipper looked at him and realized that one of his eyes was missing. He tried standing up but he fell down instantly. 
“What have you done to him grunkle ford?” Mabel yelled, and Mabel never yelled. 
“I've only run a few tests on him,” Ford said. 
“Then why does he look like that? He looks like he’s going to die any day now” mabel shouted 
“Ye, grunkle ford when  was the last time you gave him food?” dipper argued, ford thought about it. 
“P-pinetree? S-shoo-ooting s-star?” Bill mumbled, the twins rushed over to him. And picked him up. 
“Don't worry Bill, we're going to fix this,” dipper assured the demon turned human.
“Why are you helping him? He's an insane demon that tried to kill us!” ford shouted, mabel turned around and said 
“Does he look insane to you now, i think not” then the twins walked up and out of the lab. And ford didn't try to stop them. 

The twins rushed Bill to their room, Stan had fallen asleep so he didn't ask any questions, obviously. They put him on Mabel's bed, because Dipper's bed was covered in paper and stuff. 
Dipper grabbed the stuff they needed and he and Mabel started to heal him. After about a whole hour of helping bill out dipper and Mabel went to bed, well Mabel dragged out a spare mattress from under her bed and dipper went into his own bed. 
Dipper didn't sleep that night, there were multiple reasons. One was the demon turned human that was Bill Cipher who was on Mabel's bed and the other was Ford. What if Ford came up and tried to take the bill? What if ford hurt him? 
So when Bill suddenly woke up and sat up in his bed, Dipper rushed over to him. Waking up Mabel in the process, she sprung out of bed and went over to bill. 
Dipper knew Mabel was good with people so he let her calm down Bill. 
When Bill finally calmed down enough Dipper went over. 
Bill explained everything from what had happened when he had gone into Stan's mindscape and how ford had found him. 
Over the next few weeks they helped Bill get better, and it turned out Bill still had a bit of his powers, explaining how he recovered so fast and how he lasted so long without food. 
_______________________________________
I know the ending doesn't make much sense but I don't know what else to write. Sorry.