while (shadow.Energy > 0)
    shadow.Reproduce();

shadow = {};
var i = 0;

while(i<5){
    shadow.shadow = shadow;
    i++;
}

function showShadow(){
    var shadow = {};
    var i = 0;

    while(i<5){
        shadow.shadow = shadow;
        i++;
    }
    return shadow;
}

showShadow();

function getShadow(){
    var shadow = {secret : "I LOVE to pee. :)"};
    var i = 0;

    while(i<5){
        shadow.shadow = shadow;
        i++;
    }
    return shadow;
}

function findShadowsSecret(shadow){

    var currentShadow = shadow;

    while(currentShadow.secret == undefined){
        currentShadow = currentShadow.shadow;
    }

    return currentShadow.secret;
}

findShadowsSecret(getShadow());