@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');
* {
  font-family: "Poppins", sans-serif;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #202020;
}

.container{
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
button{
  position: relative;
  z-index: 1;
  margin: 10px;
  border: none;
  outline: none;
  background: #fff;
  font-size: 1.2rem;
  padding: 15px 30px;
  cursor: pointer;
  box-shadow: 10px 10px 30px rgba(0,0,0,0.25);
}
.block{
  position: absolute;
  width: 50px;
  height: 50px;
  background: #fff;
  box-shadow: 10px 10px 30px rgba(0,0,0,0.25);
}

.block:nth-child(3n+2){
  background: #444;
}
.block:nth-child(3n+3){
  background: #ff9213;
}