@-webkit-keyframes color-change-2x {

0% {

background: #19dcea;

}

100% {

background: #b22cff;

}

}

@keyframes color-change-2x {

0% {

background: #19dcea;

}

100% {

background: #b22cff;

}

}

@-webkit-keyframes slide-in-left {

0% {

-webkit-transform: translateX(-1000px);

transform: translateX(-1000px);

opacity: 0;

}

100% {

-webkit-transform: translateX(0);

transform: translateX(0);

opacity: 1;

}

}

@keyframes slide-in-left {

0% {

-webkit-transform: translateX(-1000px);

transform: translateX(-1000px);

opacity: 0;

}

100% {

-webkit-transform: translateX(0);

transform: translateX(0);

opacity: 1;

}

}

body {

-webkit-animation: color-change-2x 7s linear infinite alternate both;

animation: color-change-2x 7s linear infinite alternate both;

}

<h1> What does a crossing guard do? </h1>

<li> They tell people when it's safe to cross, and they blow their whistle when it's not. </li>

<h1> What skills and knoweldge do crossing guards have? </h1>

<li> They need advanced math skills, they need to know the difference between colors, <br> they need to be good at blowing a whistle. </li>

<h1> What personality traits describe crossing guards? </h1>

<li> Outgoing </li>

<li> Helpful </li>

<h1> What technology and education do crossing guards have? </h1>

<li> They have a whistle and green vest </li>

<li> They <em>need</em> a doctorate in advanced theoretical molecular quantum physics </li>

<p> The job outlook for crossing guards looks bright, the need for them is expected to rise. </p>