Canvas实现Loading超酷动画效果，10款超酷CSS3进度条/Loading动画效果。4组欢乐的CSS3 Loading加载动画，这4款动画是同一种模式，都是一群小球在大球里面形成各种排列从而达到Loading加载动画的效果。(Canvas Loading cool animation, 10 cool CSS3 progress bar /Loading animation. 4 groups of happy CSS3 Loading loaded animation, the 4 animations are the same pattern, all of which are a group of balls in a large ball to form a variety of arrangements to achieve the effect of Loading loading animation.)