.b-404__logo {
    -webkit-animation: animationLogo 4s linear infinite;
    -moz-animation: animationLogo 4s linear infinite;
    -o-animation: animationLogo 4s linear infinite;
    animation: animationLogo 4s linear infinite;
}
.b-404__cloud_first {
    -webkit-animation: animationCloud 200s linear infinite;
    -moz-animation: animationCloud 200s linear infinite;
    -o-animation: animationCloud 200s linear infinite;
    animation: animationCloud 200s linear infinite;
}
.b-404__cloud_second {
    -webkit-animation: animationCloud2 100s linear infinite;
    -moz-animation: animationCloud2 100s linear infinite;
    -o-animation: animationCloud2 100s linear infinite;
    animation: animationCloud2 100s linear infinite;
}


@-webkit-keyframes animationCloud{ 0%{left:0;} 50%{ left:-1000px; }, 100%{ left: -40000px;}}
@-moz-keyframes animationCloud{ 0%{left:0;} 50%{ left:-1000px; }, 100%{ left: -40000px;}}
@-o-keyframes animationCloud{ 0%{left:0;} 50%{ left:-1000px; }, 100%{ left: -40000px;}}
@keyframes animationCloud{ 0%{left:0;} 50%{ left:-1000px; }, 100%{ left: -40000px;}}

@-webkit-keyframes animationCloud2{ 0%{left:-150px;} 50%{ left:-1000px; }, 100%{ left: -40000px;}}
@-moz-keyframes animationCloud2{ 0%{left:-150px;} 50%{ left:-1000px; }, 100%{ left: -40000px;}}
@-o-keyframes animationCloud2{ 0%{left:-150px;} 50%{ left:-1000px; }, 100%{ left: -40000px;}}
@keyframes animationCloud2{ 0%{left:-150px;} 50%{ left:-1000px; }, 100%{ left: -40000px;}}

@-webkit-keyframes animationLogo{ 0%{top:0;} 50%{ top:-15px; }, 100%{ top: 15px;}}
@-moz-keyframes animationLogo{ 0%{top:0;} 50%{ top:-15px; }, 100%{ top: 15px;}}
@-o-keyframes animationLogo{ 0%{top:0;} 50%{ top:-15px; }, 100%{ top: 15px;}}
@keyframes animationLogo{ 0%{top:0;} 50%{ top:-15px; }, 100%{ top: 15px;}}