Randomly Position MoveClip without Overlapping?

[ScriptAction]

I'm using AS 3 and Flash CS 6.

I'm using this code to randomly place movie clips from the library in a container on the stage:

var container:Sprite = new Sprite();
addChild(container);
container.x = 300;
container.y = 200;

var food:food_mc = new food_mc();
container.addChild(food);
food.x = Math.random()*450;
food.y = Math.random()*350;

var food1:food_mc = new food_mc();
container.addChild(food1);
food1.x = Math.random()*450;
food1.y = Math.random()*350;

There are actually eight movie clips I am adding to the stage but just pasted the code from two.

Unfortunately they are overlapping, which isn't what I want.

Is there a way to ensure they don't overlap?

Many thanks.