img.slide, img.slide1 {
    width: 100%;
    height: auto;
}

img.slide:not(:first-child) {
    display: none;
}

img.slide1:not(:first-child) {
    display: none;
}

.container123 {
    width: 100%;
    height: auto;
    margin: 0 auto;
    position: relative;
    padding-bottom: 20px;
}

/* 2 button change slide: prev and next */
.btn-change {
    width: 30px;
    height: 30px;
    position: absolute;
    top: 50%;
    transform: translateY(-100%);
}

#next, #next1 {
    right: 10px;;
}

#prev, #prev1 {
    left: 10px;
}

/* 4 button corresponding to 4 image */
.change-img {
    text-align: center;
    margin-top: -45px;
    z-index:3001;
    position:relative;
}

.change-img button {
    background: white;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    margin-right: 8px;
    font-weight: bold;
    border: none;
    font-size: 9px;
    color: black;
}

.change-img button1 {
    background: white;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    margin-right: 8px;
    font-weight: bold;
    border: none;
    font-size: 9px;
    color: black;
}


.change-img button .active {
    background: red;
    color: white;
}
.change-img button1 .active {
    background: red;
    color: white;
}