ender dragon new leg animations

 The ender dragon flies all the time and stops sometimes at the portal in which you can go through when you kill it.

It has legs and cannot even walk,run or stand up on its legs. It is in the game for years and can't even do such animation.

Would make the game more fun to see it doing such actions on its legs. 

Make it sometimes that it will go on its four legs and chase the player and when it hits the player,It gives the player massive knockback and flies back up or stand up on its two back legs and shoots continuous fire charges quickly at the player for about 8 seconds.

Would make the game more challenging and fun as it is a Boss in the game.