Animate object every second according to set values?

Question

OK, so this has been driving me nuts for most of the morning, and I can't seem to figure it out.  (But my code writing from scratch is scrappy, at the best of times!)
I have three shape layers that need to change size every second (or possibly at another set interval), but I have the sizes defined.  It's an animated chart, with each second marking a month, but for thea animation to go smoothly.
I have found a handful of expressions, but can't seem to get any of them to work as I need them.  I've tried this:
linear(time, 0, 1,  content("mycircle").size*1,  content("mycircle").size*1.3);
Which works for one second, but can't seem to get it to size for two seconds like this:
linear(time, 0, 1,  content("mycircle").size*1,  content("mycircle").size*1.3);
linear(time, 1, 2,  content("mycircle").size*1.3,  content("mycircle").size*1.4);
And I've tried this, which like the one above, only reads the last value in the script:
content("mycircle").size.valueAtTime(time + 1)*1;
content("mycircle").size.valueAtTime(time + 2)*1.3;
content("mycircle").size.valueAtTime(time + 3)*1.4;
I thought it might be possible to do with an array, somehow, but can't figure out how.
If "mycircle" size has to change every second for each month, as below:
Month
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Second
1
2
3
4
5
6
7
8
9
10
11
12
Size
1
1.3
1.4
1.3
1.6
1.2
1.2
1.1
1
1.4
1.5
1.2
What would be the best expression to do that?  Any help at all would be greatly appreciated!
I'm fairly new to expressions, too.  Please be gentle. 

Answer 1

Try this:
myArray = [1,1.3,1.4,1.3,1.6,1.2,1.2,1.1,1,1.4,1.5,1.2];
idx = Math.min(Math.floor(time),11);
value*myArray[idx]
Dan