body{
    width: 1024px;
    height: 1250px;
    background: rgb(36,118,164);
    background: linear-gradient(185deg, rgba(36,118,164,1) 0%, rgba(102,189,179,1) 100%);
    color: white;
    font-family: 'Courier New', Courier, monospace;
    margin: auto;
    display: flex;
    justify-content: center;
    text-align: justify;
}
article{
    max-width: 900px;
    margin: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
h1{
    text-align: center;
    margin-bottom:20px;
}
#buttons{
    display: inline;
}
#cont{
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    width: 800px;
}
.show{
    width: 100px;
    height: 100px;
    margin: 20px;
    border-radius: 10px;
    display: flex;
}
.red{
    background-color: rgba(207, 22, 22, 0.829);
    animation: none;
}
.blue{
    background-color: rgb(43, 45, 139);
    animation: none 1s;
}
.yellow{
    background-color: rgba(223, 201, 10, 0.883);
    animation: none 1s;
}
.green{
    background-color: rgb(49, 187, 49);
    animation: none 1s;
}

@keyframes anOut {
    from {opacity:1;}
    to {opacity: 0;}
}
@keyframes anIn {
    from {opacity:0;}
    to {opacity: 1;}
}