:not(.walk, .walk *) > .walk {
    position: relative;
    animation: moveLeftToRight 4s linear infinite;
}
:not(.lwalk, .lwalk *) > .lwalk {
	display:inline-block;
    position: relative;
    animation: moveRightToLeft 4s linear infinite;
}

@keyframes moveRightToLeft {
  0%   { right: -100px; }
  100% { right: 100%; }
}

@-moz-keyframes moveRightToLeft {
  from   { right: -100px; }
  to     { right: 100%; }
}

@-webkit-keyframes moveRightToLeft {
  from   { right: -100px; }
  to     { right: 100%; }
}