preloader style : demo 236

HTML

                        

CSS

                        .loader{
                            width: 142px;
                            height: 142px;
                            padding: 0;
                            margin: 30px auto;
                            list-style: none;
                            position: relative;
                            animation: rotate 10s infinite linear;
                        }
                        .loader li{
                            border: 6px solid  transparent;
                            border-bottom: none;
                            transform-origin: 50% 100% 0;
                            position: absolute;
                            top: 50%;
                            left: 50%;
                            animation: rotate 3s infinite cubic-bezier(0.09, 0.6, 0.8, 0.03);
                        }
                        .loader li:nth-child(1){
                            width: 44px;
                            height: 22px;
                            margin: -22px 0 0 -22px;
                            border-color: #2172b8;
                            border-top-left-radius: 36px;
                            border-top-right-radius: 36px;
                            animation-timing-function: cubic-bezier(0.09, 0.3, 0.12, 0.03);
                        }
                        .loader li:nth-child(2){
                            width: 58px;
                            height: 29px;
                            margin: -29px 0 0 -29px;
                            border-color: #18a39b;
                            border-top-left-radius: 42px;
                            border-top-right-radius: 42px;
                            animation-timing-function: cubic-bezier(0.09, 0.6, 0.24, 0.03);
                        }
                        .loader li:nth-child(3){
                            width: 72px;
                            height: 36px;
                            margin: -36px 0 0 -36px;
                            border-color: #82c545;
                            border-top-left-radius: 48px;
                            border-top-right-radius: 48px;
                            animation-timing-function: cubic-bezier(0.09, 0.9, 0.36, 0.03);
                        }
                        .loader li:nth-child(4){
                            width: 86px;
                            height: 43px;
                            margin: -43px 0 0 -43px;
                            border-color: #f8b739;
                            border-top-left-radius: 54px;
                            border-top-right-radius: 54px;
                            animation-timing-function: cubic-bezier(0.09, 1.2, 0.48, 0.03);
                        }
                        .loader li:nth-child(5){
                            width: 100px;
                            height: 50px;
                            margin: -50px 0 0 -50px;
                            border-color: #f06045;
                            border-top-left-radius: 60px;
                            border-top-right-radius: 60px;
                            animation-timing-function: cubic-bezier(0.09, 1.5, 0.6, 0.03);
                        }
                        .loader li:nth-child(6){
                            width: 114px;
                            height: 57px;
                            margin: -57px 0 0 -57px;
                            border-color: #ed2861;
                            border-top-left-radius: 66px;
                            border-top-right-radius: 66px;
                            animation-timing-function: cubic-bezier(0.09, 1.8, 0.72, 0.03);
                        }
                        .loader li:nth-child(7){
                            width: 128px;
                            height: 64px;
                            margin: -64px 0 0 -64px;
                            border-color: #c12680;
                            border-top-left-radius: 72px;
                            border-top-right-radius: 72px;
                            animation-timing-function: cubic-bezier(0.09, 2.1, 0.84, 0.03);
                        }
                        @keyframes rotate{
                            100%{  transform: rotate(360deg); }
                        }
                    
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