*{
    box-sizing: border-box;
}
body{   
    background-color:
    black;
}
.caja1{
    background-color:
     rebeccapurple;
     height: 50px;
}
.caja2{
     background-color:
     aqua;
     height: 50px;
}
.caja3{
    background-color:
     antiquewhite;
     height: 50px;
}
.caja4{
    background-color: 
    cadetblue;
    height: 50px;
}
.caja5{
    background-color:
    burlywood;
    height: 400px;
}
.caja6{
    background-color:
     wheat;
     height: 250px;
}
.caja7{
    background-color:
    rgb(160, 173, 110);
    height: 250px;
}
.caja8{
    background-color:
     antiquewhite;
     height: 250px;
}
.caja9{
    background-color:
    violet;
    height: 250px;
}
.caja10{
    background-color:
     blueviolet;
     height: 250px;
}
.caja11{
    background-color:
     royalblue;
     height: 250px;
}
.caja12{
    background-color:
     rosybrown;
     height: 250px;
}
.caja13{
    background-color:
    palegoldenrod;
     height: 250px;
}
.caja14{
    background-color:
     rgb(113, 77, 146);
     height: 250px;
}
.caja15{
    background-color: 
    aqua;
    height: 200px;  
}
.caja16{
    background-color:
    azure;
    height: 200px;
}
.caja17{
    background-color:
     antiquewhite;
     height: 200px;
}
.caja18{
    background-color:
    teal;
    height: 200px;
}
.caja19{
    background-color:
     royalblue;
     height: 200px;
}
.caja20{
    background-color:
    rgb(160, 173, 110);
    height: 200px;
}
.caja21{
    background-color:
     rgb(25, 6, 43);
     height: 200px;
}
.caja22{
    background-color:
     aqua;
     height: 200px;
}