This is an animated special effect that uses HTML5 Canvas to simulate willow trees swaying in the wind. First of all, the simulation of willow branches and willow leaves is realized through CSS. Although it is not very realistic, this is not the focus of this animation. The point is that when we hover the mouse over the willow branches, it is like a breeze blowing over the willow branches and willow leaves. In the meantime, you can learn how to use HTML5 technology to implement animation on the Canvas drawing board.