div {
  text-align: center;
}
img {
  width: 685px;
  height: auto;
}

.img1 {
  position: absolute;
  top: 39%;
  left: 50%;
  transform: translate(-50%, -50%);
}  

.img2 {
  position: absolute;
  top: 59%;  
  left: 58%; 
  transform: translate(-61%, -50%);
  z-index: 2;
    width: 520px;
  height: auto;
}
.img3 {
  position: absolute;
  top: 42%;  
  left: 64%; 
  transform: translate(-61%, -50%);
  z-index: 2;
    width: 287px;
  height: auto;
}