Something fun for places like http://secretagentcomingthrough.com/. Example: http://imgur.com/a/PGZlc

card_smash.js

function doit(screenHeight, screenWidth) {

    // override the random to make it always gold
    Math.random = function() { return 1; }

    // remnants of a time when I cared about where it started looping from
    var startX = 0;
    var startY = 0;

    // there is a margin for the card. I can't be bothered to figure it out
    // so just taking about 20% off makes a nice overlap
    var cardWidth = 286 * .8;
    var cardHeight = 395 * .8;

    // these will probably work for most people
    screenHeight = screenHeight || 1080;
    screenWidth = screenWidth || 1920;

    // loop the loop
    for (var currentX = startX; currentX <= screenWidth; currentX += cardWidth) {
        for (var currentY = startY; currentY <= screenHeight; currentY += cardHeight) {
            addImage({clientX: currentX, clientY: currentY});
        }
    }
}

doit();