body{
  display: flex;
  background-color:rgb(20,170,0);
  text-align: center;
  color: white;
  border: 3px solid #00008a;
  
}
.bir{
  flex: 1fr 1fr;
}
.mumi{
  display: flex;
  flex:1fr 1fr 1fr 1fr;
  width:100%;
  padding-bottom: 300px;
}
.brdr{
  margin-right: 3px;
  border-radius: 1rem;
  border: 3px solid white;
}