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        void ofApp::setup(){
    ofSetWindowShape(500, 500);
    gif.setupPaused(170, 220);
    gif.fadeInOut(6, 4, ofColor::white, 0);
    card1.setup("card-1.png", 1.0, TEXTURE_OFFSET_MIDDLE_RIGHT);
    card2.setup("glass-2.png", 1.0, TEXTURE_OFFSET_MIDDLE_RIGHT);
    card3.setup("card-mask.png", 1.0, TEXTURE_OFFSET_MIDDLE_RIGHT);
    card4.setup("card-mask.png", 0.75, TEXTURE_OFFSET_MIDDLE_LEFT);
    glass1.setup("glass-1.png", 0.4, TEXTURE_OFFSET_TOP_LEFT);
    glass2.setup("card-1.png", 150.0, TEXTURE_OFFSET_BOTTOM_LEFT);
    glass3.setup("glass-2.png", 110.0, TEXTURE_OFFSET_BOTTOM_RIGHT);
    glass4.setup("glass-2.png", 120.0, TEXTURE_OFFSET_TOP_LEFT);
    masker.setup(4, ISOLATE_LAYERS);
    card4.incrementTextureOffset(-0.1, -0.5);
    ofSetWindowShape(1200, 1000);
    masker.toggleOverlay();
}

void ofApp::update(){
    masker.beginLayer(0);
    {
        ofSetColor(ofColor::red);
        card1.incrementTextureOffsetX(0.003);
        card1.draw();
    }
    masker.endLayer(0);
    
    masker.beginMask(0);
    {
        glass2.incrementTextureOffsetX(0.005);
        glass2.incrementTextureScale(0.1);
        glass2.draw();
    }
    masker.endMask(0);

    masker.beginLayer(1);
    {
        ofSetColor(ofColor::red);
        card2.incrementTextureOffsetX(0.002);
        card2.draw();
    }
    masker.endLayer(1);
    
    masker.beginMask(1);
    {
        glass3.incrementTextureOffsetX(0.002);
        glass3.incrementTextureScale(0.05);
        glass3.draw();
    }
    masker.endMask(1);

    masker.beginLayer(2);
    {
        ofSetColor(ofColor::red);
        card3.incrementTextureOffsetX(0.005);
        card3.draw();
    }
    masker.endLayer(2);
    
    masker.beginMask(2);
    {
        glass4.incrementTextureOffsetX(0.008);
        glass4.incrementTextureScale(0.14);
        glass4.draw();
    }
    masker.endMask(2);

    masker.beginLayer(3);
    {
        glass1.incrementTextureOffset(-0.0025, 0.004);
        glass1.incrementTextureScale(0.004);
        glass1.draw(0, -gif.halfHeight);
        glass1.draw(0, gif.halfHeight, TEXTURE_FLIP_HORIZONTAL);
    }
    masker.endLayer(3);
    
    masker.beginMask(3);
    {
        card4.incrementTextureScale(0.0075);
        card4.incrementTextureOffsetX(0.001);
        card4.draw();
    }
    masker.endMask(3);
}

void ofApp::draw(){
    gif.begin();
    {
        gif.rotateAroundCenter(270);
        //card1.draw();
        masker.draw();
    }
    gif.endAndCaptureFrame();
    gif.draw();
    masker.drawOverlay();
}