<script>let leon, canvas, ctx;

const sw = 800;
const sh = 600;
const pixelRatio = 2;

function init() {
    canvas = document.createElement('canvas');
    document.body.appendChild(canvas);
    ctx = canvas.getContext("2d");
    
    canvas.width = sw * pixelRatio;
    canvas.height = sh * pixelRatio;
    canvas.style.width = sw + 'px';
    canvas.style.height = sh + 'px';
    ctx.scale(pixelRatio, pixelRatio);

    leon = new LeonSans({
        text: 'Lu Shuyu',
        color: ['#f08300'],
        size: 100,
        weight: 600,
        drawing: ['1']
    });

    let i, total = leon.drawing.length;
    for (i = 0; i < total; i++) {
    TweenMax.fromTo(leon.drawing[i], 1.6, {
        value: 0
    }, {
        delay: i * 0.5,
        value: 1,
        ease: Power4.easeOut
    });
}

    requestAnimationFrame(animate);
}

function animate(t) {
    requestAnimationFrame(animate);

    ctx.clearRect(0, 0, sw, sh);

    const x = (sw - leon.rect.w) / 2;
    const y = (sh - leon.rect.h) / 2;
    leon.position(x, y);

    leon.draw(ctx);  
}
window.onload = () => {
    init();
};
</script>