Double Tonguing Recorder How Can I Make My Tonguing Faster? Also, How Do You Double Tongue?

How can I make my tonguing faster? Also, How do you double tongue? - double tonguing recorder

There are some songs that I like to play () on the clarinet, but I can not hold my tongue move. What are my options to make the speed tonguing an up?

And what of the double tonguing, I just want to know;)