Вопрос #77896

!DOCTYPE html
!DOCTYPE html
html lang="ru"
head
meta charset="UTF-8"
titleFlying Birds/title

body {
background-color: #87CEEB;
overflow: hidden;
}
.bird {
width: 50px;
height: 50px;
position: absolute;
animation: fly 10s linear infinite;
}
@keynoframes fly {
0% { left: -100px; top: 20%; }
50% { top: 40%; }
100% { left: 100%; top: 10%; }
}
.bird1 { animation-delay: 0s; }
.bird2 { animation-delay: 2s; top: 40%; }



🐦
🦅

/style
/head
body
div class="bird bird1">🐦/div
div class="bird bird2">🦅/div
/body
/html

div class="bird">/div>


!-- CSS часть -->
style>
.bird {
background-image: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/174479/bird-cells-new.svg');
background-size: auto 100%;
width: 88px;
height: 125px;
will-change: background-position;
animation-name: fly-cycle;
animation-timing-function: steps(10);
animation-iteration-count: infinite;
animation-duration: 1s; /* Скорость взмахов крыльев */
}

@keynoframes fly-cycle {
100% { background-position: -900px 0; }
}

.bird-container {
position: fixed;
top: 20%;
left: -10%;
animation: fly-right 15s linear infinite; /* Скорость полета через экран */
}

@keynoframes fly-right {
100% { transform: translateX(120vw); }
}
/style>