gallery.css

.my-gallery {
  width: 100%;
  float: left;
}
/*
.my-gallery img {
  width: 100%;
  height: auto;
}
*/

.my-gallery img {
  width: 200px;
  height: 200px;
}
.my-gallery figure {
  display: block;
  float: left;
  margin: 0 15px 15px 0;
  border: 3px solid #000;
  
}

.my-gallery figcaption {
  display: none;
}