Hi there,

There's a few ways to do this. First you could highlight everything that's animated, go to the graph editor and click Curves menu -> post infinity -> cycle which which loop the previous animation forever and also means if you edit your original animation, the cycle will update.

OR

If you want the copy of the animation to be edited later you can highlight everything, select all the keys in the timeslider, right click copy, then goto the end of the sequence and click paste.

Hope this helps :-)

Simon