Add inline empty space between two elements.
Empty space: 20px
<div class="w20px"></div>Empty space: 30px
<div class="w30px"></div>Empty space: 40px
<div class="w40px"></div>Empty space: 50px
<div class="w50px"></div>Empty space: 70px
<div class="w70px"></div>Empty space: 100px
<div class="w100px"></div>