Pure CSS3 Animation plane demo with CSS3 clipart:

#plane_wrap{
animation-name: plane;
animation-duration: 5s;
animation-iteration-count: infinite;
animation-timing-function: linear;
}
	
keyframes plane {
from {
top:235px);
}
50%{
top:265px;
}
to {
top:230px;
}
}