Thank you for your support and reply, at first I used get axis to monitor the player's movement to control blood loss, but this game will often crash for unknown reasons, so I changed to monitor the player's keys to control blood loss, but I think I should use a better way to monitor whether the player presses the button, in the current situation, if you press A and D at the same time, or W and S, there is a probability of losing blood while moving,due to my personal ability, I was unable to solve all kinds of bugs in the game very well......