#main {
    display: flex;
    align-items: flex-end;
}

#main {
    display: table-cell;
    vertical-align: bottom;
}

#block1, #block2 {
    display: flex;
    align-items: flex-end;
}

#block2 {
   display: flex;  
   align-items: flex-end;
   background-color:#CC9933;
}

@keyframes css-animation-float {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
  100% {
    transform: translateY(0);
  }
}
 
.float {
  display: inline-block;
  animation: css-animation-float 3s ease-in-out infinite;
}