Moving a movie clip via key press event question.

Question

I have a project where I'm trying to move the movie clip: "wally", up and down three levels of a stage.
However, from the default position I have him move up 145 pixels, and down 120 pixels.
I want to limit this action to one use, meaning if wally goes up once from his default position he must come back down, and vice versa, if he goes down he must come back up(or stay on that level). Also, if he goes up the 145 pixels, he needs to come back down 145 pixels, likewise if he goes down 120 pixels, he needs to come back up 120 pixels. I might be over-thinking this, as I had to strip it back to the starting code the other day, and am at a loss once more. If this'd be easier performed by moving with keyboard arrows and case statments, let me know, as I'm stumped.
Starting code:
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyPressHandler1);
function keyPressHandler1(event:KeyboardEvent):void
          if(event.keyCode==38)
                    wally.y -= 145;
                    else if(event.keyCode==40)
                    wally.y += 120;

Answer 1

use:
wally.startY = wally.y;
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyPressHandler1);
function keyPressHandler1(event:KeyboardEvent):void
          if(event.keyCode==38)
if(wally.y==wally.startY){
                    wally.y -= 145;
} else if(wally.y>wally.startY){
wally.y=wally.startY
                    else if(event.keyCode==40)
if(wally.y==wally.startY){
                    wally.y += 120;
} else if(wally.y<wally.startY){
wally.y=wally.startY;
p.s. please mark helpful/correct responses.