hi thanks for the reply.
i used ‘wiggle – position’ from the effects menu.
I have had a look for keyframes to copy and paste to the other layer but it seems it is an expression to generate random numbers like you said.
On the expression line it says:
wiggle(effect(“wiggle – position”)(“wiggle speed (wigs/sec)”), effect(“wiggle – position”)(Wiggle Amount (pixels)”))