/* don't delete this because is a root function of BEM methodology */
/* for sample */
/* BEM Methodology sample */
.Block {
  color: green;
  /* this is the modifier of the block because the modifier is outside the element and inside the  block */
}
.Block__element {
  color: red;
  /* if you want to make a modifier inside an element you can nested the modifier class */
}
.Block__element--modifier-of-element {
  color: green;
}

.Block--modifier {
  color: blue;
}