*,*::after, *::before {
  box-sizing: border-box;
}

body {
  padding: 0;
  margin: 0;
  background: #141f1f;
}

.container {
  display: flex;
  justify-content: center;
}

.bpmcontainer {
  position: absolute;
  background: black;
}

h3 {
  color: grey;
  text-align: center;
}

.bpm {
  background: black;
  width: 200px;
  height: 110px;
  color: #0066ff;
  font-size: 90px;
  text-align: center;
  border: 2px white solid;
}

.btnContainer {
  position: absolute;
  background: grey;
  width: 100px;
  height: 100px;
  border: 2px black solid;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

#btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.semi1 {
  position: absolute;
  width: 125px;
  height: 125px;
  border-top: 10px solid black;
  border-bottom: 10px solid transparent;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-radius: 50%;
  top: 70%;
  left: 50%;
  transform: translate(-50%, -70%);
}

.red1 {
  position: absolute;
  width: 125px;
  height: 125px;
  border-top: 10px solid red;
  border-bottom: 10px solid transparent;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-radius: 50%;
  top: 70%;
  left: 50%;
  transform: translate(-50%, -70%);
}

.semi2 {
  position: absolute;
  width: 125px;
  height: 125px;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 10px solid transparent;
  border-right: 10px solid black;
  border-radius: 50%;
  top: 50%;
  left: 30%;
  transform: translate(-30%, -50%);
}

.red2 {
  position: absolute;
  width: 125px;
  height: 125px;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 10px solid transparent;
  border-right: 10px solid white;
  border-radius: 50%;
  top: 50%;
  left: 30%;
  transform: translate(-30%, -50%);
}

.semi3 {
  position: absolute;
  width: 125px;
  height: 125px;
  border-top: 10px solid transparent;
  border-bottom: 10px solid black;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-radius: 50%;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -30%);
}

.red3 {
  position: absolute;
  width: 125px;
  height: 125px;
  border-top: 10px solid transparent;
  border-bottom: 10px solid white;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-radius: 50%;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -30%);
}

.semi4 {
  position: absolute;
  width: 125px;
  height: 125px;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 10px solid black;
  border-right: 10px solid transparent;
  border-radius: 50%;
  top: 50%;
  left: 70%;
  transform: translate(-70%, -50%);
}

.red4 {
  position: absolute;
  width: 125px;
  height: 125px;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 10px solid white;
  border-right: 10px solid transparent;
  border-radius: 50%;
  top: 50%;
  left: 70%;
  transform: translate(-70%, -50%);
}