body {
    height: 100%;
    width: 100%;
    /*display: flex;*/
    align-items: center;
    justify-content: center;
    background-color: aqua;
    background: url("assets\\th3.png");
    background-size: 2500px;
 }

 h1{
  margin-top: 70px;
}

  
  #mycanvas {
    background-color: black;
    margin-top: 5rem;
    justify-content: center;
    align-items: center;
    margin-left: 32%;
    /*content: "";
    position: relative;
    display: block;*/
    
  }
  .back a{
    text-decoration: none;
    padding-left: 20px;
    padding-right: 20px;
    padding-top: 14px;
    padding-bottom: 14px;
    background-color: darkviolet;
    color: white;
    border-radius: 25px;
    margin-top: 80px;
    margin-bottom: 80px;
    margin-left: 100px;
    display: inline-block;
}
a:hover{
    opacity: 0.8;
}
.back{
    text-align: center;
  
}