html, body, * {
    margin: 0;
    padding: 0;
    background-color: hotpink;
	}


.canvas {
    width: 1200px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
        }

.circle1 {
    background-color: palegreen;
    border-radius: 50%;
    height: 600px;
    width: 600px;
    float: left;
    margin-left: 300px
    transform: translateX(100px);

    animation-name: opacity;
    animation-duration: 1s;
    animation-iteration-count: infinite;
    animation-direction: alternate;
}

.circle2 {
    background-color: gold;
    border-radius: 50%;
    height: 400px;
    width: 400px;
    width: 400px;
    float: left;
    margin-right: 30px
    transform: translateX(-100px);

    animation-name: opacity;
    animation-duration: 1s;
    animation-iteration-count: infinite;
    animation-direction: alternate;
}

.circle3 {
    background-color: deepskyblue;
    border-radius: 50%;
    height: 300px;
    width: 300px;
    width: 300px;
    margin-top: 20px
    float: left;
    transform: translateX(-100px);

    animation-name: opacity;
    animation-duration: 1s;
    animation-iteration-count: infinite;
    animation-direction: alternate;
}

.circle4 {
    background-color: lightgray;
    border-radius: 50%;
    height: 200px;
    width: 200px;
    width: 200px;
    float: left;
    margin-left: 10px
    transform: translateX(-100px);

    animation-name: opacity;
    animation-duration: 1s;
    animation-iteration-count: infinite;
    animation-direction: alternate;
}

.circle5 {
    background-color: white;
    border-radius: 50%;
    height: 100px;
    width: 100px;
    width: 100px;
    float: left;
    margin-left: 100px;
    transform: translateX(-100px);

    animation-name: opacity;
    animation-duration: 1s;
    animation-iteration-count: infinite;
    animation-direction: alternate;
}

@keyframes opacity {
    from {opacity: 1}
    to {opacity: .1}
}