One possible theme could be the fear of the unknown. Since it's a horror story, the 'bhuter' (if it's a supernatural entity) represents something that people don't fully understand.
The 'bhuter golpo horror story' is a bit of a mystery to me. However, generally in horror stories, there are often themes like fear of the supernatural. If 'bhuter' represents some sort of supernatural being, the story could be about how people in the story interact with it, perhaps being haunted or chased by it. It could also include elements of mystery, where the characters are trying to figure out how to get rid of the 'bhuter' or solve the mystery behind it.
Family values play a significant role as well. In Bengali golpo love stories, family approval or disapproval can be a major factor in the development of the love story. Sometimes, the characters have to fight against their family's wishes to be with the person they love, while in other cases, they abide by their family's decisions which leads to a different kind of love story, often a tragic one.
One possible theme could be the fear of the unknown. Since the knock is something mysterious, it represents the unknown danger lurking.
In 'gorgon a horror story', a likely theme is the battle between good and evil. The Gorgon could be seen as an embodiment of evil, and the characters who oppose it represent good. Another theme could be the theme of transformation, not just in the literal sense of being turned to stone, but also in how the characters are changed by their encounters with the Gorgon. They might become more cautious, more desperate, or even more heroic in their attempts to survive.
The theme of the unknown can also be present. There could be strange, unidentifiable shapes or noises in the dream. The dreamer doesn't know what these things are or what they might do, and this uncertainty creates a sense of dread.
A theme of betrayal could also be present in the Veronica horror story. Perhaps someone she trusted, a friend or a family member, has led her into the horror situation. Or there could be a betrayal from a supernatural entity that she thought she could trust or make a deal with. This betrayal then becomes a major part of the horror that she has to endure.
Another theme might be the idea of a cursed object. The ribbon could be cursed, and anyone who interacts with it is doomed to face horror. This theme often plays on the fear of the inescapable consequences of coming into contact with something that is 'tainted'. For example, the characters in the story might try to get rid of the ribbon, but it always finds its way back to them, bringing more and more horror. It could also be about the theme of revenge. Maybe the ribbon was once a symbol of love or friendship, but something bad happened, and now it's a tool for revenge, and the horror it brings is the revenge being exacted on the unwitting victims.
Typically, 'bangla premer golpo love story' might feature strong family influence. In Bangladeshi culture, family plays a big role in relationships. So, the story could have elements of family approval or disapproval of the love.
One possible theme could be the fear of the unknown. The fat man's true nature and motives are not clear at first, which creates suspense and horror.
One possible theme could be death and the afterlife. If there were deaths on or near the bridge, the story might revolve around the spirits of the dead not being at peace. Another theme could be isolation. Bridges can be isolated places, and in a horror story, this could be used to create a sense of vulnerability for the characters in the story.