html, body {
  margin: 0;
  padding: 0;
  background-color: rgb(4, 4, 56);
  
  overflow-x: hidden;
  display: flex;
  justify-content: center;
}

canvas {
  display: block;
}

.button {
  display: inline-block;
  padding: 10px 20px;
  font-size: 18px;
  cursor: pointer;
  margin: 5px;
}

#bt{
  position: fixed;
  top: 400px;
  align-content: center;
  text-align: center;
  width: 400px;
}