.spinner {
    margin: 100px auto;
    width: 50px;
    height: 60px;
    text-align: center;
    font-size: 10px;
}

.spinner > div {
    height: 100%;
    width: 6px;
    display: inline-block;
    -webkit-animation: stretchdelay 1.2s infinite ease-in-out;
    animation: stretchdelay 1.2s infinite ease-in-out;
} 

.spinner > div:nth-child(2n) {
    background-color: #67CF22; 
} 

.spinner > div:nth-child(2n-1) {
    background-color: orange; 
} 

.spinner .rect2 {
    -webkit-animation-delay: -1.1s;
    animation-delay: -1.1s;
}

.spinner .rect3 {
    -webkit-animation-delay: -1.0s;
    animation-delay: -1.0s;
}

.spinner .rect4 {
    -webkit-animation-delay: -0.9s;
    animation-delay: -0.9s;
}

.spinner .rect5 {
    -webkit-animation-delay: -0.8s;
    animation-delay: -0.8s;
}

@-webkit-keyframes stretchdelay {
    0%, 40%, 100% { -webkit-transform: scaleY(0.4) } 
    20% { -webkit-transform: scaleY(1.0) }
}

@keyframes stretchdelay {
    0%, 40%, 100% {
        transform: scaleY(0.4);
        -webkit-transform: scaleY(0.4);
    }  20% {
        transform: scaleY(1.0);
        -webkit-transform: scaleY(1.0);
    }
}