.container_eraser {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  bottom:0px;
}
.container_eraser img {padding:0px; margin:0px; border:none; outline:none;}

#robot {
  position: absolute;
  bottom: 0px;
  left: 0px;
  z-index: 1;
  
}

#redux {
  position: absolute;
  bottom: 0px;
  left: 0px;
  z-index: 2;
}