You can unlock your tablet in two different ways. You can reset your password through the Google account that you used on the tablet. To do this, input a few more times a wrong patter until a message appears on the display asking if you forgot the password. When you see it, tap on it an follow the instructions provided. To do this, you need to have an active Internet connection. If you can't unlock your deice using this way, you can perform a factory reset that will remove the password, but will wipe all your data as well. To do this, turn your tablet OFF and press the Volume Up button + the Power button until the Android logo pops up on the screen. Use the Volume buttons to navigate through the menu and select Wipe data/Factory reset. This should unlock your device.