body{
  text-align: center;
  background-color: #001a33;
}
#start{
  font-family: 'Press Start 2P', cursive;
  font-size: 3rem;
  margin:5%;
  color: #d6f5f5;
}
.container{
  display: block;
  width:50%;
  margin:auto;

}
.btn{
  margin: 25px;
  display: inline-block;
  height: 190px;
  width: 190px;
  border: 10px solid black;
  border-radius: 30%;
  }
.red {
  background-color: red;
}

.green {
  background-color: green;
}

.blue {
  background-color: blue;
}

.yellow {
  background-color: yellow;
}
.pressed {
  box-shadow: 0 0 20px white;
  background-color: grey;
}
.gameover{
    background-color: red;
    opacity: 0.8;

  }