Three Act-Structure
The three-act structure is a model used in screenwriting that divides a fictional narrative into three parts, often called the Setup, the Confrontation and the Resolution.
The first act is usually used for exposition, to establish the main characters, their relationships and the world they live in. Later in the first act, an on-screen incident occurs that confronts the main character (the protagonist), whose attempts to deal with this incident lead to a second and more dramatic situation, known as the first turning point, which signals the end of the first act.
Act I comprises the first quarter of the screenplay. (For a two hour movie, Act I would last approximately 30 minutes.)
Act II comprises the next two quarters of the film. (For a two hour movie, Act II would last approximately 60 minutes.)
Act III comprises the final quarter of the film. (For a two hour movie, Act III would be the final 30 minutes.)
Attack The Block
In search for valuables, moses gets his face scratched by a pale, hairless, eyeless dog-sized creature; the object which fell from the sky was its cocoon. The creature runs away, but the gang chase and kill it. Hoping to gain fame and fortune, they take the corpse to their acquaintance, cannabis dealer Ron, to get advice on what to do.
They find that Samantha lives in their building, force their way into her flat, An alien bursts in and Moses kills it. Understanding that the group was not lying about the creatures being extraterrestrial, Samantha reasons that it is safer to stay with the gang. The gang moves upstairs to the flat of some girls that they know, believing that their security gate will keep them safe. The aliens instead attack from outside, climbing up the side of the tower block and smashing through the windows
As a university student, Brewis theorizes that the aliens are like spores, drifting through space on solar winds until they chance on a suitable planet. After landing in an area with enough food, the female lets off a strongpheromone which will attract the male creatures to it so that they can mate and propagate their species in their new world.
Samantha successfully avoids the aliens, turns on the gas and leaves the Block. Moses, with the dead female alien strapped to his back, rushes out of the weed room and into his flat, while the males converge on the scent and chase Moses through the block. Inside his flat he throws the female into the kitchen and the males follow. Using fireworks, Moses ignites the gas-filled room and leaps out of the window. The explosion engulfs the flat and the aliens, but Moses survives, clinging to a Union Flag hanging from the side of the building
