problems with sister

i wish i was an adult already because i could do anything i want . I'm strong , my skin fells like a soft pillow and i like wearing dark clothes and my skin color is tanish . My sister just comes in my roomand just starts making a mess in my room. my sister is a total mess she just start throwing stuff around than she unfold s your blanket. when i got to tell my mother but she dont believe that she makes am ess a mess in my room. so one day i put a video camera in my room that my sister couldnt see it and to see how she mess my room i ten mi utes  so i started to record her so when she stopped i stop the video camera iafter that i wne t to the kitchenand i told my mother that i got so when i open the camera there was nothing there and that while she was making a mess in my room i was not recording nuffing. The next day i wnet to buy a tape for the video camera after that i went to a grocery store buy me some chips and a arizona i went home to put the tape in the camera but i couldnt find the camera anywhere  so wat i did is that i put my phone to record and i record her but the batery had died on me so i had to charge it and i charge it but it had no memory card on it. So i still showed my mother and she got in trouble  and she got punish for one month in she cant go outside with her friends and hangout