function generateFaces(){
for (i=0; i < 5; i++){
var img = document.createElement("img");
img.src = "smile.png";
var random1 = Math.floor(Math.random() * (400 - 0 + 1)) + 0;
var random2 = Math.floor(Math.random() * (400 - 0 + 1)) + 0;
img.style.top = __________________;
img.style.left = __________________;
leftSide.appendChild(img);
img.style.position = "absolute"; //or "relative" or "fixed"
img.style.top = random1 + 'px';