Question: Please help me with these animations!

Hi everybody,
I have these two (three) animations (a single animation and a array with two other animations) and I would like to plot the three animations such that when I click on the play button of one of them, all the three animations starts at the same time.. I don't know how to get this, please help me if you can!
This is the code of my animations that I'd want to run at the same time:

The first:

display([mech||(2..nstep+2)],insequence=true,gridlines=true,title="Mechanism Animation\n",

(I modified manually the dimensions of this first animation and I would like to mantain the dimensions
I chose, this is important for me!!)
And the second:


Thanks everybody for help! 

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