Hello World!
I'm talking about moving the arms of bipeds in Alice3.

I have thor selected,
I'm going to select thors right shoulder
and then turn it to the left 0.125.
When I run it the arm moves forward.
With bipeds, the two arms are mirror images of each other.

If I want to put both arms in front of him,
I'm going to copy this to the clipboard...
and change this to the left shoulder 
(That's a little off the page)
and instead of turning to the left,
I'm going to turn to the right.
And you can see that both arms move out in front of him
because I have used the opposite for these two commands 
because they are mirror images of each other.

I'm going to also put his arms back afterwards,
so I want to copy this to the clipboard and drop it right there.
And move it back by moving it to the right.
and copy this to the clipboard and move it to the left.
so he should swing his right arm forward and back
and then do his left arm.
You can see we've used commands that are opposites of each other.
Let's do one more thing,
let's take that right shoulder this time and roll it to the right 0.25
and run it and that's a roll.
So can we roll the left shoulder in the same direction?

Let's change this to the left shoulder. 
and instead of rolling to the right, we'll 
roll to the left.
And there we go!