Am I right, is this in the Moths' dream? If so, there will be spoilers below.
You need to get a syringe in a world with cockroaches, then in the same world teleport through a pool of blood into a maze, find a colorful house, there you will get cigarettes. Go to the blue door, where there will be a white space with monsters. Through one of the monsters, teleport into space with mother (that creepy creature is Randall's mother) and interact with her. After receiving a knife from her, return to the world with cockroaches and interact with trash cans until you find yourself in an enclosed space with a lantern. Interact with phone, and then with the portal and (if I'm not mistaken) use the phone again and you will find yourself in a rainy forest, where you will find the last house (there you will receive a tape)