@media (max-width:720px){
.a{background-color:black;}
.a1{posution:absolute;top:0px;left:0px;color:blue;font-size:30px;}
.a2{position:absolute;top:800px;background-color:yellow;color:purple;font-size:40px;width:300px;height:50px;border-radius:30px;}
.a5{position:absolute;top:900px;background-color:yellow;color:purple;font-size:40px;width:300px;height:50px;border-radius:30px;left:20px;}
.a6{background-color:red;border-radius:30px;}
}