.newbutton3 {
background-color:#63A292;
color:#030;
border-radius:5px;
padding:0px 0px;
border:solid 1px #999;
box-shadow:2px 2px 2px #333;
width:50px;
height:20px;
transition: all 0.2s ease-in-out 0s;
font-weight:normal;
}
.newbutton3:hover {
    background-color: #003300;
    color: yellow;
}

.slideshow {
width:100%;
height:auto;
padding:5px;
box-sizing:border-box;
position:relative;
}

.slideshow img {
position:absolute; 
animation:slideshow 20s infinite; 
opacity:0; 
width: 100%;
height: auto;
}

@keyframes slideshow {
25%{opacity:1;
} 
45%{
opacity:0;
}
}

.slideshow img:nth-child(4){animation-delay:0s;}
.slideshow img:nth-child(3){animation-delay:5s;}
.slideshow img:nth-child(2){animation-delay:10s;}
.slideshow img:nth-child(1){animation-delay:15s;}