Create decorative image border with CSS? [closed]

These links can help you get started:

https://stackoverflow.com/questions/33759102/wave-border-in-css

https://stackoverflow.com/questions/25895895/creating-a-droplet-like-border-effect-in-css/25903879#25903879

You can do an effect like this using pseudo-elements and css3.

You could even turn the border into an SVG:

.divider {
  border: 32px solid transparent;
  border-image:url(../svg/wave_96x96_border-image.svg) 32 round round;
  background-color: #3c93c9;
}

Good luck.