preloader style : demo 190

                        .demo{ background: #ee6290; }
                        .loader{
                            width: 150px;
                            height: 80px;
                            margin: 40px auto;
                            position: relative;
                        }
                        .loader .loader-inner{
                            width: 6px;
                            height: 52px;
                            background: #f7f7f7;
                            margin: 6px 4px;
                            float: left;
                        }
                        .loader .loader-inner:nth-child(1n){
                            margin-left: 4px;
                            animation: loading-1 linear 500ms infinite;
                        }
                        .loader .loader-inner:nth-child(2n){ animation: loading-2 linear 500ms infinite; }
                        .loader .loader-inner:nth-child(3n){ animation: loading-3 linear 500ms infinite; }
                        .loader .loader-inner:nth-child(4n){ animation: loading-4 linear 500ms infinite; }
                        @keyframes loading-1{
                            0%,50%,100%{
                                transform: translateY(0);
                            }
                            25%{
                                transform: translateY(-6px);
                            }
                            75%{
                                transform: translateY(6px);
                            }
                        }
                        @keyframes loading-2{
                            0%,100%{
                                transform: translateY(-6px);
                            }
                            25%,75%{
                                transform: translateY(0);
                            }
                            50%{
                                transform: translateY(6px);
                            }
                        }
                        @keyframes loading-3{
                            0%,100%{
                                transform: translateY(6px);
                            }
                            25%,75%{
                                transform: translateY(0);
                            }
                            50%{
                                transform: translateY(-6px);
                            }
                        }
                        @keyframes loading-4{
                            0%,50%,100%{
                                transform: translateY(0);
                            }
                            25%{
                                transform: translateY(6px);
                            }
                            75%{
                                transform: translateY(-6px);
                            }
                        }