Tell me a doppelganger horror story.

There was a family living in a small town. The daughter in the family, named Lily, noticed a girl who looked just like her. This doppelganger seemed to follow her everywhere. One day, Lily followed the doppelganger into an old abandoned building. Inside, she saw a whole family of doppelgangers, like a mirror image of her own family but with a more sinister air. The doppelganger family seemed to be living in a parallel existence. Lily ran away in fear and told her family. They were all very scared and started to look into the history of the town to see if there were any stories related to doppelgangers.

One common element is the sense of unease and fear when the protagonist first sees their doppelganger. It's that moment of shock and disbelief. Another is the doppelganger often having an otherworldly or menacing appearance, like strange eyes or a pale complexion. Also, there's usually a feeling of being hunted or chased by the doppelganger, which heightens the horror.

One 1920 horror story could be about a haunted mansion. In 1920, there was a large, old mansion on the outskirts of a small town. A young couple moved in, ignoring the rumors. At night, they heard strange noises, like whispers and creaking floors. The wife would see a shadowy figure in the hallway. As they explored, they found a locked room in the attic. When they finally opened it, a cold wind blew out, and they saw old portraits with eyes that seemed to follow them. Terrified, they fled the mansion and never returned.

There was a haunted forest where people often got lost. A hiker named Tom ventured into it. As he walked deeper, the trees seemed to close in on him. He heard whispers that sounded like they were coming from the trees themselves. Then, he saw a figure in a white dress floating among the trees. Tom was so scared that he dropped his backpack and ran in the opposite direction. He didn't stop until he was out of the forest, but he could still feel the eyes of the figure on his back.

There was a small village haunted by a vengeful spirit. Every night, people would hear a blood - curdling scream. A traveler passing through the village decided to stay in an old inn. During the night, he woke up to a strange scratching sound on his window. When he looked outside, he saw a pale face with long black hair staring at him. The face started to melt into the window, and the traveler felt a cold hand grab his ankle. He quickly grabbed his things and ran out of the inn, never looking back.

Once upon a time, there was an old, abandoned mansion on the outskirts of town. A group of curious teenagers decided to explore it one night. As they entered, the door slammed shut behind them. They heard strange whispers and creaking sounds. In one of the rooms, they saw a figure in the corner. When they got closer, it vanished. Then, one by one, they started to disappear. Only one girl managed to escape, but she was never the same again, haunted by the memories of that night.

The doppelganger could be a clone of Peter created by some mad scientist. The clone has Peter's memories up to a certain point but then has been programmed with different motives. So when they meet, Peter has to figure out how to deal with this exact copy of himself that has been turned into a tool by someone else.

Once upon a time, in a small town there was a strange place called 'Ican'. At night, people would hear eerie whispers coming from there. One brave soul, Jack, decided to investigate. As he entered the old, dilapidated building at 'Ican', he felt a cold breeze. Suddenly, the door slammed shut behind him. He saw shadowy figures moving in the dark. Jack tried to run but it was as if the place was playing tricks on him, making him go in circles. In the end, he never came out and the whispers at 'Ican' only grew louder.

Once, a girl was hitchhiking at night. A car stopped and the driver seemed friendly at first. But as they drove further into the woods, his face became menacing. He started talking about strange and dark things. She realized she was in danger. She managed to jump out of the moving car and ran into the woods, hiding until morning.

Once, a man won a huge lottery. He was overjoyed at first. But then, his family members started fighting over the money. His siblings accused him of not sharing fairly, and his parents took sides. The situation got so bad that they ended up in court, and the man's relationships were completely destroyed. All the joy from winning the lottery vanished, leaving only bitterness and regret.