Array consists of meshes you want to spawn, and the number of meshes is calculated by dividing the distance between start and end point to a set mesh length, and then placing each mesh at a set distance from each other. I’ve actually made a whole street system based on that Fence BP that spawns buildings, roads, sidewalks and street lights as you drag the end point and i’m not great at blueprints, so it is quite easy really. Just play around with the fence BP’s variable values and try to figure out what does what, then turn it into what you want to achieve.