* {
  box-sizing: content-box;
}
.container {
  display: flex;
  justify-content: center;
  align-content: center;
}
.heart {
  width: 40px;
  height: 40px;
  background: red;
  margin: 20px;
  transform: rotate(45deg);
  position: absolute;
}
.heart::after,
.heart::before {
  content: '';
  height: 40px;
  width: 40px;
  background: red;
  position: absolute;
  border-radius: 50%;
}
.heart::after {
  left: -20px;
}
.heart::before {
  top: -20px
}