#sketchpad {
    position: fixed; 
    top: 0; 
    left: 0; 
    z-index: -10;
    
} 
.btn_st_dr {
    z-index: 20;
    position: fixed;
    bottom: 5%;
    left: 2px;
}
.nav_dr{
    width: 50px;
    height: 50px;
    position: fixed;
    top: 35%;
    left: 25px;
    transform: translateX(-50%);
    align-items: center;
    justify-content: space-around;
    opacity: .3;
    transition: opacity .5s;
    display: none;
}
.nav_dr:hover{
    opacity: 1;
}
.clr_dr{
    height: 25px;
    width: 25px;
    background-color: blue;
    border-radius: 50%;
    border: 3px solid rgb(117, 109, 122);
    transition: transform .5s;
    margin: 0 auto;
    
}
.clr_dr:hover{
    transform: scale(1.2);
}
.clr_dr:nth-child(1){
    background-color: #000;
}
.clr_dr:nth-child(2){
    background-color: #EF626C;
}
.clr_dr:nth-child(3){
    background-color: #faef57;
}
.clr_dr:nth-child(4){
    background-color: #24d102;
}
.clr_dr:nth-child(5){
    background-color: #040951;
}
.btn_dr{
    padding: .6em 1em;
    border-radius: 3px;
    background-color: #fbf469;
    color: #000;
    width: 75px;
    height: 50px;
}
.btn_dr img {
    width: 25px;
}

@media only screen and (max-width: 640px) {
    .btn_st_dr {
        display: none;
    }
}