What happens next?

How to do a double leg takedown 
Perfect your shoot step. 
The shoot is the building block of lots of wrestling takedowns. The double-leg takedown is essentially a quick shoot in at your opponent's lower body that ends with you wrapping up the legs and dropping to the mat.
Since a good wrestler will practice shoots frequently throughout the week, it's a good way of starting to think about getting a double-leg takedown into your repertoire of moves. Stay in your stance with your lead leg slightly forward, bent over at the hips, with your head up.