This development diary summarizes the creation of a movie poster for the horror film "Ancestors". Key steps included: 1) Choosing a black background to convey fear and the unknown. 2) Adding the title and release date with a shadow effect to appear ghostly. 3) Cropping and editing an image of a doll's face to highlight eyes of different colors representing good and evil. 4) Including production details and logos to make the poster appear professional.