Why do you feel like you need to cut? If it's for relief, there are a lot of better ways to calm down, including going for a run, writing your thoughts down, taking a bath, etc. If it's for attention, skip the cutting and just tell your parents you're feeling lousy.
I was also depressed and I used to cut myself, hoping my parents would eventually see so they could get me the help I needed. They did see and get me that help, and I'm doing much better, but I wish at that age I had the vocabulary to talk about my problems. I didn't so I resorted to a violent act, which left scars on the inside and outside. I want you to know you can get the help you need without hurting yourself.
If you'd like, you can message me here and we can talk about different ways for you to feel better.