.bird-container{will-change:transform;animation-name:fly-right-one;animation-duration:15s;animation-timing-function:linear;animation-iteration-count:infinite;position:absolute;left:-10%}.bird{will-change:background-position;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;animation-name:fly-cycle;animation-duration:.8s;animation-timing-function:steps(10,end);animation-iteration-count:infinite;transform:scale(.7)}@keyframes fly-cycle{0%{background-position:0 0}to{background-position:-900px 0}}@keyframes fly-right-one{0%{transform:scale(.2)translate(-10vw)}10%{transform:translateY(var(--bird-y1,2vh)) translateX(10vw) scale(.25)}20%{transform:translateY(var(--bird-y2,0vh)) translateX(30vw) scale(.3)}30%{transform:translateY(var(--bird-y3,4vh)) translateX(50vw) scale(.35)}40%{transform:translateY(var(--bird-y4,2vh)) translateX(70vw) scale(.35)}50%{transform:translateY(var(--bird-y5,0vh)) translateX(90vw) scale(.35)}60%{transform:translateY(var(--bird-y6,0vh)) translateX(110vw) scale(.35)}to{transform:translateY(var(--bird-y7,0vh)) translateX(110vw) scale(.35)}}@keyframes fly-right-two{0%{transform:translateY(-2vh)translate(-10vw)scale(.5)}10%{transform:translateY(0)translate(10vw)scale(.4)}20%{transform:translateY(-4vh)translate(30vw)scale(.6)}30%{transform:translateY(1vh)translate(50vw)scale(.45)}40%{transform:translateY(-2.5vh)translate(70vw)scale(.5)}50%{transform:translateY(0)translate(90vw)scale(.45)}51%{transform:translateY(0)translate(110vw)scale(.45)}to{transform:translateY(0)translate(110vw)scale(.45)}}