* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.balloon-animation {
    position: relative;
    height: 100vh;
    width: 100%;
    background-color: #00e7ff;
}

.flying-cloud {
    position: absolute;
    width: 20%;
}

.flying-balloon {
    position: absolute;
    width: 15%;
    top: 20%;
    left: 50%;
}

.flying-cloud:nth-child(1) {
    top: 25px;
    z-index: 1;
}

.flying-cloud:nth-child(2) {
    left: 20%;
    top: 30%;
}

.flying-cloud:nth-child(3) {
    left: 24%;
}

.flying-cloud:nth-child(4) {
    right: 33%;
    top: 25%;
}

.flying-cloud:nth-child(5) {
    left: 60%;
    z-index: 1;
}