[class*='myRibbon-'] {
  position: absolute;
  width: 100px;
  height: 50px;
  bottom: 20px;
  right: -10px;
  box-sizing: border-box;
  display: flex;
  justify-content: center;
  align-items: center;
}

[class*='myRibbon-']:before {
  content: "";
  position: absolute;
  top: -10px;
  right: 0;
  border-right: 5px solid transparent;
  border-top: 5px solid transparent;
}

.myRibbon-1::before {
  border-left: 5px solid;
  border-bottom: 5px solid;
}

.myRibbon-2::before {
  border-left: 5px solid;
  border-bottom: 5px solid;
}

.myRibbon-3::before {
  border-left: 5px solid;
  border-bottom: 5px solid;
}

[class*='myRibbon-']:after {
  content: "";
  position: absolute;
  top: 0px;
  left: -1px;
  border-left: 25px solid #FFF;
  border-right: 25px solid transparent;
  border-top: 25px solid transparent;
  border-bottom: 25px solid transparent;
}