Animate my object

[brileiz]

Hi I am new to animation trying to use some expressions for a little animation I am trying for fun . Essentially I want my object to start randomly on the comp and if it is in the lower part of the screen it is large and if it goes to the top it's small all while randomly going around the comp how would I make this thank you 

[Dan Ebberts]

How about something like this for position:

wiggle(1,thisComp.height/2)

and something like this for scale?

minScale = 25;
maxScale = 200;
s = linear(position[1],0,thisComp.height,minScale,maxScale);
[s,s]

[brileiz]

Hi Dan,

thanks for your response. I was able to get a few things working from your tips. Although, i am still wondering how do i make the comp object start in random positions. thanks.

[Dan Ebberts]

I'm not sure exactly what your work flow is, but if you apply that wiggle expression to position and then duplicate the object a buch of times, the copies should be scattered randomly about the comp.

[Dan Ebberts]

This is a better version of the position expression--it gives a better horizontal distribution:

w = wiggle(1,1) - value;
value + [w[0]*thisComp.width,w[1]*thisComp.height]/2