.exerciseslider {
    position: relative;
    overflow: hidden;
    width: 700;
    height: 438;
  }
  
  .exerciseslide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
  }
  
  .exerciseslideactive {
    opacity: 1;
  }