Escape successfully

Stella heard the commotion at the door... She was so scared that she almost stepped on the iron pole under her feet! She leaned back and almost fell off the swing... Knock, knock, knock... "Miss Richard, are you in the room? I have brought you your afternoon tea!" A servant's voice came from outside the door. Stella was so frightened that she didn't know what to say... Should she go back to the room? However, in this way, everything she did would be in vain! Then, she would have to climb out of the window again later! That kind of risky thing... It would be enough to do it once, she would not dare to do it again! In particular, she will stuck on the swing! If she went back to the room... It would be more troublesome! It would be more difficult. Knock, knock, knock... "Miss Richard, why can't the door of your room be opened? Do you want me to open the door with the key? Are you in the room? Did something happen?" "No... No, no... When Stella heard that someone was trying to open the doo