#bg1 {
  background-image: url(../img/btc/bg1.webp);
  background-position: center;
}

#bg2 {
  background-image: url(../img/btc/bg2.png);
  background-position: 50% 63%;
}

#bg3 {
  background-image: url(../img/btc/bg3.png);
  background-position: 50% 30%;
}

#bg4 {
  background-image: url(../img/btc/bg4.png);
  background-position: 50% 76%;
}

#bg5 {
  background-image: url(../img/btc/bg5.png);
  background-position: center;
}