Pattern Lock that I've made in

Pattern Lock that I've made in 2017

It's a Pattern Lock from Xiaomi Phone
I've made it in purpose of practicing and getting some experience in programming field so don't ask the question why I made it on PC

this.lock = [1, 5, 9, 6, 3, 2, 4, 7, 8];

lock is an array of the correct sequence of dots you should connect. After connecting dots displaying on canvas lock is comparing with checked var, which contains the sequence of dots user has connected. If the value of checked is equal to the value of lock then lock grants access, otherwise the error is displaying on the top of the screen. You can change the value of this variable if you want other lock code to be set.