* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    background: greenyellow;
    font-family: Arial, Helvetica, sans-serif;
}


#triangle-up {
  width: 0;
  height: 0;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-bottom: 100px solid rgb(0, 0, 0);
  top: 42px;
  left: 210px;
  transition: all 0.5s ease-in;
}

#triangle-up::before {
  content: "";
  position: absolute;
  width: 0;
  top: -85px;
  left: -18px;
  border-width: 0 45px 35px;
  border-style: solid;
  border-color: transparent;}

#triangle-up.change-me {
  border-left: 100px solid blue;
  /*translate: 200px;*/
  transform: translateX(200px) translateY(400px) rotate(20deg) scale(2.5);
}

#triangle-up.change-me{
  border-color: blue;
  /*left: 300px;*/
  /*translate: 300px;*/
  transform: translateX(300px) translateY(200px) scale(2.4) rotate(33deg) skewX(12px);
}

#triangle-up::before.change-me{
  border-color: blue;
}

/*.change-me{
  border-color: blue !important;
}*?