preloader style : demo 220

                        .preloader{
                            height: 90px;
                            width: 90px;
                            margin: 0 auto;
                            position: relative;
                        }
                        .preloader-inner{
                            background: radial-gradient(#e74c3c,#d62717);
                            width: 20px;
                            height: 20px;
                            margin: auto;
                            border-radius: 20%;
                            position: absolute;
                            top: 0;
                            left: 0;
                            animation: moveit 3s linear infinite;
                        }
                        .nested1{ background: radial-gradient(#ff7f50,#ff6348); }
                        .nested2{ background: radial-gradient(#1dd1a1,#10ac84); }
                        .nested3{ background: radial-gradient(#5f27cd,#341f97); }
                        .nested4{ background: radial-gradient(#ff9ff3,#f368e0); }
                        .nested5{ background: radial-gradient(#c8d6e5,#8395a7); }
                        @keyframes moveit{
                            0%{
                                left: 0px;
                                top: 0px;
                            }
                            25%{
                                left: 70px;
                                top: 0px;
                            }
                            50%{
                                left: 70px;
                                top: 70px;
                            }
                            75%{
                                left: 0px;
                                top: 70px;
                            }
                            100%{
                                top: -70px;
                                top: 0px;
                                transform: rotate(360deg);
                            }
                        }