bagaimana membuat posisi div selalu tetap saat menggulir

/*in the css section simply set the position to fixed and then set the bottom
the width the height the right/left etc.

example

#hotbar4{
  width: 100px;
height: 100px;
background-color: gray;
position: fixed;
bottom: 0;
border: 10px solid black;
background-image: none;
right: 400px;
background-size: 100%;

}
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