Two Threads: render thread and main thread path clone new a handler axis + path -> dest axis + path + handler -> dest animation
point + bezier(waterdrop)->line + arrow -> axis -> multi axis + lines -> rotate -> fireworks -> playback -> window open ->main page.
recyclerview (all curve) ->cardsview ->ad ->developer
color waterfall + color fireworks
花边（分型，Ｎ次贝塞尔曲线的积分＋不同颜色) litter->big circle shape flower
圆形分形骷髅