Trains, plans and desires (sexual desire).
Children, simple thinking represents their rational side.
Play, childlike innocence represents reason.
Children playing on the train show that reason is seduced by sexual desire.
Railways are defined by the direction of hard courage (sexual desire).
The child fell off the train and tracks and was crushed to death by the train, indicating that he lost his mind because of his persistent pursuit of sexual desire.
Blood, forbearance, sacrifice for something, represents sexual desire.
There is blood everywhere, and sexual desire is very strong.