body{
	font-size:20px;
  width: 1000px;
  height: 1500px;
}



#back{
  mix-blend-mode: multiply;
  position:fixed;
  display:flex;
  flex-direction:row; 
  flex-wrap:wrap;
  justify-content:center;
  
}
/* 
.circle{
  width: 100px;
  height: 100px;
  border-radius: 50%;
  display:inline-block;
  background-color:yellow;
  padding:20px;
  margin:50px;
  -webkit-transition: background-color 2s ease-out;
  -moz-transition: background-color 2s ease-out;
  -o-transition: background-color 2s ease-out;
  transition: background-color 2s ease-out;
} */
.circle{
background-color:yellow;
display: inline-block;
width: 100px;
  height: 100px;
  border-radius: 50%;
  display:inline-block;
/*transform: rotate(-80deg);
width: 100px;
height: 100px;
border-top-left-radius: 50%;
border-bottom-left-radius: 50%;
border-bottom-right-radius: 50%;*/

-webkit-transition: background-color 2s ease-out;
-moz-transition: background-color 2s ease-out;
-o-transition: background-color 2s ease-out;
transition: background-color 2s ease-out;
transition: all 1s ease-out;
}


.circle:hover {
  width: 200px;
  height: 200px;
  background-color:#ff00a6 ;

  position: relative;
}



.circle1{
  width: 100px;
  height: 100px;
  border-radius: 50%;
  display:inline-block;
  border-style: solid;
  border-color: #ff00a6;
  border-width: 60px;
  
}




/*
.box {
  width: 150px;
  height: 150px;
  background: red;
  margin-top: 20px;
  margin-left: auto;
  margin-right: auto;
  -webkit-transition: background-color 2s ease-out;
  -moz-transition: background-color 2s ease-out;
  -o-transition: background-color 2s ease-out;
  transition: background-color 2s ease-out;
}

.box:hover {
  background-color: green;
  cursor: pointer;
}*/