<div id="other">other</div>
<div id="parent">
  parent
  <div id="me">me</div>
</div>
<div id="large">large</div>
body{
  padding-top:30px;
}
#parent, #other{
  border:5px solid tomato;
}
#large{
  height:10000px;
  background-color: tomato;
}
#me{
  background-color: black;
  color:white;
  position: fixed;
  left:0;
  top:0;
  text-align: center;
}
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