*{
font-family: sans-serif;
background-color: rgb(113, 126, 192) ;
animation-name: body1;
animation-duration: 20s;
animation-iteration-count: infinite;
margin: 0;
padding: 0;
box-sizing: border-box;
}
body{
  max-width: 1500px;
  
}

.box{

  display: flex;
  text-align: center;
  justify-content: center;
  margin-top: 20%;
  
}

.box1{
  background-color: rgba(169, 98, 98);
  padding: 80px 150px;
  
}

.h3{
  font-size: 2em;
  color: rgb(0, 0, 0);
  background:none;
  text-shadow: 2px 1px 1px black;
  
}

.btn{
  background: none;
  font-size: 20px;
  margin: 60px 40px 0 40px ;
  padding: 10px 20px;
  box-shadow: 5px 5px;
}

#No{
  animation-name: no;

}

@keyframes body1{
  0%   {background-color:rgb(250, 173, 173); left:0px; top:0px;}
  25%  {background-color:rgb(246, 246, 189); left:200px; top:0px;}
  50%  {background-color:rgb(188, 188, 247); left:200px; top:200px;}
  75%  {background-color:rgb(190, 249, 190); left:0px; top:200px;}
  100% {background-color:rgb(225, 196, 247); left:0px; top:0px;}
  
}