arrow code and also how to fade and move it! HELP PLEASE!

Hello, can anyone help me create a simple white solid shape arrow (a long triangle) that bobs up and down and fades in and out. The shape i'd like this for is the first image below. I found one on these forums that is more of a 'v' shape, now I'd like one that is a solid white triangle that has the same effect.

Hoping someone can help me, would be massively grateful. It's to invite people to scroll down in a nice discreet way that fits with the page design.

Here's the code I found that I'd like something similar for this new arrow.

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<div class="scroll-down2"></div>
<style>
  .scroll-down2 {
    position: absolute;
    left: 50%;
    bottom: 10px;
    display: block;
    text-align: center;
    font-size: 20px;
    z-index: 100;
    text-decoration: none;
    text-shadow: 0;
  width: 10px;
  height: 10px;
  border-bottom: 8px solid white;
  border-right: 8px solid white;
  z-index: 9;
  left: 50%;
  -webkit-transform: translate(-50%, 0%) rotate(45deg);
  -moz-transform: translate(-50%, 0%) rotate(45deg);
  transform: translate(-50%, 0%) rotate(45deg);
    -webkit-animation: fade_move_down 4s ease-in-out infinite;
    -moz-animation:    fade_move_down 4s ease-in-out infinite;
    animation:         fade_move_down 4s ease-in-out infinite;
}

/*animated scroll arrow animation*/
@-webkit-keyframes fade_move_down {
  0%   { -webkit-transform:translate(0,-10px) rotate(45deg); opacity: 0;  }
  50%  { opacity: 1;  }
  100% { -webkit-transform:translate(0,10px) rotate(45deg); opacity: 0; }
}
@-moz-keyframes fade_move_down {
  0%   { -moz-transform:translate(0,-10px) rotate(45deg); opacity: 0;  }
  50%  { opacity: 1;  }
  100% { -moz-transform:translate(0,10px) rotate(45deg); opacity: 0; }
}
@keyframes fade_move_down {
  0%   { transform:translate(0,-10px) rotate(45deg); opacity: 0;  }
  50%  { opacity: 1;  }
  100% { transform:translate(0,10px) rotate(45deg); opacity: 0; }
}
</style>

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You can use code in this thread