preloader style : demo 239

                        .loader{
                            width: 100px;
                            height: 100px;
                            margin: 0 auto;
                            position: relative;
                        }
                        .loader span{
                            background-color: #8e44ad;
                            position: absolute;
                            left: 25px;
                            top: 25px;
                            bottom: 25px;
                            right: 25px;
                            clip-path: polygon(0 0, 0% 100%, 100% 100%);
                            animation: animate 2s infinite ease-out;
                        }
                        .loader span:nth-child(2){
                            clip-path: polygon(0 0, 100% 100%, 100% 0);
                            animation: animate2 2s infinite ease-out;
                        }
                        @keyframes animate{
                           0%, 100%, 75%{
                                background-color: #8e44ad;
                                transform: translateX(0);
                            }
                            25%{
                                background-color: #2980b9;
                                transform: translateX(24px);
                            }
                            50%{
                                background-color: #e74c3c;
                                transform: translateY(-25px);
                            }
                        }
                        @keyframes animate2{
                          0%, 100%{
                                background-color: #8e44ad;
                                transform: translateX(0);
                            }
                            25%{
                                background-color: #2980b9;
                                transform: translateX(-24px);
                            }
                            50%{
                                background-color: #e74c3c;
                                transform: translateY(25px);
                            }
                        }