.my-0 {
  margin-top: 0;
  margin-bottom: 0m;
}

.my-atom-1 {
  margin-top: .75rem;
  margin-bottom: .75rem;
}

.my-atom-2 {
  margin-top: 1rem;
  margin-bottom: 15rem;
}

.my-atom-3 {
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
}

.my-atom-4 {
  margin-top: 2rem;
  margin-bottom: 2rem;
}

.my-molecule-1 {
  margin-top: 2.5rem;
  margin-bottom: 2.5rem;
}

.my-molecule-2 {
  margin-top: 3rem;
  margin-bottom: 3rem;
}

.my-molecule-3 {
  margin-top: 4rem;
  margin-bottom: 4rem;
}

.my-molecule-4 {
  margin-top: 4.5rem;
  margin-bottom: 4.5rem;
}

.my-organism-1 {
  margin-top: 5.5rem;
  margin-bottom: 5.5rem;
}

.my-organism-2 {
  margin-top: 6rem;
  margin-bottom:6rem;
}

.my-organism-3 {
  margin-top: 7.5rem;
  margin-bottom: 7.5rem;
}

.my-organism-4 {
  margin-top: 10rem;
  margin-bottom: 10rem;
}