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<html> <head> <title>Let's Start </title> <style> body{ background:#fff; margin:1em; font-family:sans-serif; } .box { width:100px; height:100px; background:#FF0101; margin:5px; } .red { background:red; } .blue { background:blue; } </style> </head> <body> <div class="box red"></div> <div class="box red"></div> <div class="box blue"></div> <div class="box blue"></div> <div class="box blue"></div> </body> </html>