1.

Draw the DNA structure​

Answer»

REFER TO THE ATTACHMENT body{ margin: 0; padding: 0; overflow: hidden; min-height:500vh; background: radial-gradient( #63c5ff,#0380bb);}.box{ position:absolute; top: calc(50% -175px); left:calc(50% -100px); width: 200px; height: 350px; transform-style: preserve-3d; transform: perspective(1200px) rotateY(310deg);}.box div{ position:absolute; top:30%; left:60%; width:100%; height:100%; transform-style: preserve-3d; animation-name: animate; animation-duration:5s; animation-iteration-count: infinite; animation-timing-function: linear; }@keyframes animate{ 0% { transform: perspective(1200px) rotateX(0deg); } 100% { transform: perspective(1200px) rotateX(359deg); }}.box div span{ position:absolute; top:0; left:0; display:block; width:100%; height:100%; border: 1px solid #000; border-left: 2px solid #000; border-right: 2px solid #000; box-sizing:border-box; }.box div span:nth-child(1){ transform: rotateX(0deg);}.box div span:nth-child(2){ transform: rotateX(11.25deg); }.box div span:nth-child(3){ transform: rotateX(22.5deg);}.box div span:nth-child(4){ transform: rotateX(33.75deg);}.box div span:nth-child(5){ transform: rotateX(45deg);}.box div span:nth-child(6){ transform: rotateX(56.25deg);}.box div span:nth-child(7){ transform: rotateX(67.5deg);}.box div span:nth-child(8){ transform: rotateX(78.75deg);}.box div span:nth-child(9){ transform: rotateX(90deg);}.box div span:nth-child(10){ transform: rotateX(101.25deg);}.box div span:nth-child(11){ transform: rotateX(112.5deg);}.box div span:nth-child(12){ transform: rotateX(123.75deg);}.box div span:nth-child(13){ transform: rotateX(135deg);}.box div span:nth-child(14){ transform: rotateX(146.25deg);}.box div span:nth-child(15){ transform: rotateX(157.5deg);}.box div span:nth-child(16){ transform: rotateX(178.75deg);}.box div span:nth-child(17){ transform: rotateX(180deg);}.box div span:before,.box div span:after{ content:''; color: balck; text-align:center; position:absolute; width:100%; height:100px; border: 1px solid #000; box-sizing: border-box; background: radial-gradient(#fff,#031321);}.box div span:before{ top: 0; left:0; }.box div span:after{ bottom: 0; left:0; }.dan{ color:white; font-weight:bold; font-size:40px; text-align:center; animation-name:animatedan; animation-iteration-count:infinite ; animation-timing-function:alternate; animation-duration:4s;}@keyframes animatedan{ 0% { color:red; font-size:40px; } 100% { color:blue; font-size:30px; }}


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