HTML & CSS CSS Ribbon style

[System32]

So, I have this ribbon:


Works great, awesome. Now, How can I revert this? I want arrow to point to the left. This is ribbon css:

.ribbon3 {
  width: 150px;
  height: 50px;
  line-height: 50px;
  padding-left: 15px;
  position: absolute;
  left: -8px;
  top: 20px;
  background: #f51111;
}
.ribbon3:before, .ribbon3:after {
  content: "";
  position: absolute;
}
.ribbon3:before {
  height: 0;
  width: 0;
  top: -8.5px;
  left: 0.1px;
  border-bottom: 9px solid black;
  border-left: 9px solid transparent;
}
.ribbon3:after {
  height: 0;
  width: 0;
  right: -14.5px;
  border-top: 25px solid transparent;
  border-bottom: 25px solid transparent;
  border-left: 15px solid #f51111;
}

HTML is simple:

<span class="ribbon3">Admin</span>

One more question, can I add small dashed border(1px) inside the ribbon, like this:


Image is awefall but...