preloader style : demo 280

HTML

                        

CSS

                        .loader{
                            width: 150px;
                            height: 150px;
                            margin: 0 auto;
                            position: relative;
                        }
                        .loader:before,
                        .loader:after{
                            content: '';
                            position: absolute;
                            top: 0;
                            left: 0;
                        }
                        .loader:before{
                            width: 150px;
                            height: 150px;
                            border: 10px solid #fff;
                            border-radius: 50%;
                            animation: animate 1s infinite -0.3s;
                        }
                        .loader:after{
                            border: 10px solid #fff;
                            border-radius: 50%;
                            transform: translateY(-50%);
                            top: 50%;
                            left: 35px;
                            animation: animate_1 4s infinite steps(1);
                        }
                        @keyframes animate{
                            to{ transform: rotateX(180deg); }
                        }
                        @keyframes animate_1{
                            0%{ opacity: 0; }
                            25%{ opacity: 1; }
                            50%{ box-shadow: 30px 0 0 #fff; }
                            75%{ box-shadow: 30px 0 0 #fff, 60px 0 0 #fff; }
                        }
                    
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