body{ 
  background-image: url(https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcSGxJJmQ6I9a4ZUyZGr-K2KDG68IX23WhfoSwNnBJGLCw_WCxuk&usqp=CAU);
  background-repeat: no-repeat;
  background-size: 850px auto;
}

button:hover {
  background-color:yellow;
}

.myDiv{
/* position:absolute;
  top: 100px;
  left: 0;*/
  margin-top: 210px;
  margin-left: 25px;  
}

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
 
}