.w
  .p.a
  .p.b
  .p.c
  .p.d

body {
  display:grid;
  justify-content:center;
  align-content:center;
  min-height:100vh;
}

.w {
  width:calc(50vmin * 2/3);
  height:50vmin;
  position:relative;
  overflow:hidden;
}

.p {
  background:center/cover no-repeat url(https://images.unsplash.com/photo-1547157284-6d35248ba7e7?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60);
  width:100%;
  height:100%;
  position:absolute;
}

.a {
  background-size:100% 100%;
  filter:hue-rotate(72deg);
}

.b {
  background-size:105% 105%;
  filter:hue-rotate(144deg);
}

.c {
  background-size:110% 110%;
  filter:hue-rotate(216deg);
}

.d {
  background-size:115% 115%;
  filter:hue-rotate(288deg);
}


@keyframes a { 
  from {
    clip-path:inset(0 80% 80% 0);
  }
  25% {
    clip-path:inset(0 20% 80% 0);
  }
  50% {
    clip-path:inset(0 20% 20% 0);
  }
  75% {
    clip-path:inset(0 80% 20% 0);
  }
  to { 
    filter:hue-rotate(144deg)contrast(1.5);
    clip-path:inset(0 80% 80% 0);
  } 
}

@keyframes b { 
  from {
    clip-path:inset(0 0 80% 20%);
  }
  25% {
    clip-path:inset(0 0 80% 80%);
  }
  50% {
    clip-path:inset(0 0 20% 80%);
  }
  75% {
    clip-path:inset(0 0 20% 20%);
  }
  to { 
    filter:hue-rotate(216deg)contrast(1.5); 
    clip-path:inset(0 0 80% 20%);
  } 
}

@keyframes c { 
  from {
    clip-path:inset(20% 80% 0 0);
  }
  25% {
    clip-path:inset(20% 20% 0 0);
  }
  50% {
    clip-path:inset(80% 20% 0 0);
  }
  75% {
    clip-path:inset(80% 80% 0 0);
  }
  to { 
    clip-path:inset(20% 80% 0 0);
    filter:hue-rotate(288deg)contrast(1.5);
  } 
}

@keyframes d { 
  from {
    clip-path:inset(20% 0 0 20%);
  }
  25% {
    clip-path:inset(20% 0 0 80%);
  }
  50% {
    clip-path:inset(80% 0 0 80%);
  }
  75% {
    clip-path:inset(80% 0 0 20%);
  }
  to { 
    clip-path:inset(20% 0 0 20%);
    filter:hue-rotate(72deg)contrast(1.5);
  } 
}

.a {animation:a 3s infinite;}
.b {animation:b 3s infinite;}
.c {animation:c 3s infinite;}
.d {animation:d 3s infinite;}

// Pen has been updated to not using js @2019/2/4 
// Removed mouse interaction