A description of the shots within the trailer and also added bits to complete the storyline

My idea for the storyline is that a boy called 'Adam' has the house to himself for the night and his friends 'Sam' and 'Jack' come over for the night. The friends are just having a typical 'boys night' until one of the friends, 'Jack' tells the others about a game that he heard about called 'Slender', he tells them that the character within the game 'Slender Man' stalks you down until he finally abducts and kills you and if you don't believe that the myth of the 'Slender Man' is true, he comes to get you. The friends then decide to play the game and decide to stop when the character jumps out and scares them, however they refuse to believe that the myth is real. 'Adam' then decides to shut the curtains as it's dark outside and its freaking the friends out, when shutting the curtains he scans outside whilst shutting them and for a split second thinks he sees the character out of the game outside before looking away, he's a bit worried so decides to look again and sees there is nothing there. The friends then get takeaway to carry on the conventions of a typical 'boys night in'. 'Sam' then goes over to pay the delivery man and as he does his eyes wander over the shoulder of the delivery man to a Lamp Post and see the character again just stood dead still. The delivery man then coughs to get 'Sams' attention again and looks stern as he wants the money so he can carry on with his job, once he's paid the delivery man, 'Sam' then looks back over the shoulder to find that the figure has disappeared again like the first time. 'Sam' and 'Adam' then say to 'Jack' that it may sound weird but they think they saw the figure of 'Slender Man' as they say this they hear a huge bang and metallic noises, they go to check it out and see that the door is now locked by a huge padlock and they now go back to the other room and conclude that 'Slender Man' is after them and is now in the house. The lights then turn off however nothing happens, as 'Jack' manages to light a candle 'Slender Man' is stood right behind him and the candle then gets put out again taking us into darkness however this time 'Jack' is taken. 'Sam' and 'Adam' are a little shook up about the whole thing however after getting themselves back in order, 'Sam' reveals that the only way to destroy 'Slender Man' is with a bullet to the heart. 'Sam' and 'Adam' then go and get 'Adams' dads gun as he is a police officer. As they do this 'Slender Man' once again confronts them however this time Adam shouts 'What do you want!?' in which 'Slender Man' proceeds to say with his only lines within the whole thing apart from some groans and shouts 'Your souls' after this 'Adam' and 'Sam' manage to get away however in the end 'Adam' leaves the house without 'Sam' due to 'Sam' selflessly telling 'Adam' to 'Save himself'. As 'Adam' leaves he runs down an alley close to his home however once he gets to the spotlight in the middle he sees 'Slender Man' at the other side so he turns to run the other way and again sees 'Slender Man' at the other side, 'Adam' therefore turns around a second time which as he does so puts him face to face with 'Slender Man' and this is were the trailer ends as it cuts to a black screen.