The genre of this movie is that it is horror and  three codes are murder, knifes and weapons you would expect people getting killed and thier would be voilence. In the cover it looks like they are only four main characters but they also show a shadow of people standing nect to them this might show that thier is some people that have died.Three conventions of this movie would be blood, violence and murder. The signifier of this movie is that the hero/victims are at front and the killer will be at the back. The donatives level are that there is going to be one serial killer might kill the people who are front of him or the people in front of him might kill him.  This poster also shows the audience that there is a killer and main character who may die or survive but they know there will be violence and blood.I think next to the three people is a cast of shadow this could show that they are the people who died. This also shows that this movie will be restricted to a certain age group because of the violence it contains.