.swiper-wrapper.swiper-slide:nth-of-type(1){background:url("../img/p1_bg.jpg");background-size:100%100%;}.swiper-wrapper.swiper-slide:nth-of-type(1)img:nth-child(1){position:absolute;top:35%;left:4%;animation:rotate_flower14slinearinfinite;}.swiper-wrapper.swiper-slide:nth-of-type(1)img:nth-child(2){position:absolute;top:23%;left:45%;animation:rotate_flower24slinearinfinite;}.swiper-wrapper.swiper-slide:nth-of-type(1)img:nth-child(3){position:absolute;top:32%;left:33%;animation:rotate_flower24slinearinfinite;}.swiper-wrapper.swiper-slide:nth-of-type(1)img:nth-child(4){position:absolute;top:46%;left:43%;animation:rotate_flower34slinearinfinite;}.swiper-wrapper.swiper-slide:nth-of-type(1)img:nth-child(5){position:absolute;top:38%;left:77%;animation:rotate_flower24slinearinfinite;}.swiper-wrapper.swiper-slide:nth-of-type(1)img:nth-child(6){position:absolute;top:31%;left:48%;animation:rotate_flower14slinearinfinite;}.swiper-wrapper.swiper-slide:nth-of-type(1)img:nth-child(7){position:absolute;top:26%;left:28%;animation:rotate_flower34slinearinfinite;}.swiper-wrapper.swiper-slide:nth-of-type(1)img:nth-child(8){position:absolute;top:35%;left:67%;animation:rotate_flower34slinearinfinite;}.swiper-wrapper.swiper-slide:nth-of-type(1)img:nth-child(9){position:absolute;top:25%;left:89%;animation:rotate_flower24scubic-bezier(.2,0,.1,0)infinite;}.swiper-wrapper.swiper-slide:nth-of-type(1)img:nth-child(10){position:absolute;top:33%;left:75%;animation:rotate_flower14slinearinfinite;}@keyframesrotate_flower1{to{transform:rotate(359deg);top:78%;}}@keyframesrotate_flower2{to{transform:rotate(359deg);top:92%;}}@keyframesrotate_flower3{to{transform:rotate(359deg);top:86%;opacity:0;}}我现在是一个一个写的很挫啊而且不能有很多花瓣很多花瓣是怎么在只有几个的情况下无限生成不用canvas能实现么或者用canvas怎么实现呢