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Float 3 divs one on the top of another

I want to make something like this: 例如

I have written it all, but can't make 3 divs appear one on the top of another.

How can I make it so that the red, blue and yellow colours are on one-another?

 .box{ width:150px; height:150px; }.red{ background:#bf1900; }.yellow{ background:#bfa900; }.blue{ background:#1d00bf; }.green{ width: 100%; height: 100px; background:#00700f; position: absolute; bottom: 0; }.black{ background: black; position: absolute; top: 0; right: 0; width: 250px; }
 <html> <head> <link rel="stylesheet" href="style.css"> </head> <body> <div class="box red"></div> <div class="box yellow"> </div> <div class="box blue"> </div> <div class="box green">Always on the bottom with 100% width</div> <div class="box black"><font color="white">Always on the right top</font></div> </body> </html>

You can accomplish that by using these properties:

Eg

position: absolute - by making position absolute, you can then use top and left properties to shift the boxes around.

z-index: 1 - to overlap the individual boxes

top: 10px - to shift the box from the top of it's container

left: 10px - to shift the box from the left of it's container

Example Code:

 .box{ width:150px; height:150px; } /* Make the 3 boxes' position absolute*/.red, .yellow, .blue{ position: absolute; } /* Add z-index, top, and left properties to individual boxes */ /* Use z-index: 9999, ie something that's higher than the rest if you want blue box to always be on top of others. */.red{ background:#bf1900; z-index: 1; top: 24px; left: 16px; }.yellow{ background:#bfa900; z-index: 2; top: 16px; left: 12px; }.blue{ background:#1d00bf; z-index: 3; }.green{ width: 100%; height: 100px; background:#00700f; position: absolute; bottom: 0; }.black{ background: black; position: absolute; top: 0; right: 0; width: 250px; }
 <html> <head> <link rel="stylesheet" href="style.css"> </head> <body> <div class="box red"></div> <div class="box yellow"> </div> <div class="box blue"> </div> <div class="box green">Always on the bottom with 100% width</div> <div class="box black"><font color="white">Always on the right top</font></div> </body> </html>

This is one way to do it, might not be very responsive etc. but from here you can probably do the rest

 .box{ width:150px; height:150px; position: absolute; }.colors{ position: absolute; left: 40px; top:40px; width: 170px; height: 170px; }.red{ background:#bf1900; top: 0; left: 0; }.yellow{ background:#bfa900; top: 20px; left: 20px; }.blue{ background:#1d00bf; top: 10px; left:10px; }.green{ width: 100%; height: 100px; background:#00700f; position: absolute; bottom: 0; }.black{ background: black; position: absolute; top: 0; right: 0; width: 250px; }
 <html> <head> <link rel="stylesheet" href="style.css"> </head> <body> <div class="colors"> <div class="box red"></div> <div class="box yellow"> </div> <div class="box blue"> </div> </div> <div class="box green">Always on the bottom with 100% width</div> <div class="box black"><font color="white">Always on the right top</font></div> </body> </html>

 .box{ width:150px; height:150px; position: absolute; }.red{ background:#bf1900; }.yellow{ background:#bfa900; margin: 40px; }.blue{ background:#1d00bf; margin: 20px; z-index: 1; }.green{ width: 100%; height: 100px; background:#00700f; position: absolute; bottom: 0; }.black{ background: black; position: absolute; top: 0; right: 0; width: 250px; }
 <html> <head> <link rel="stylesheet" href="style.css"> </head> <body> <div class="box red"></div> <div class="box blue"> </div> <div class="box yellow"> </div> <div class="box green">Always on the bottom with 100% width</div> <div class="box black"><font color="white">Always on the right top</font></div> </body> </html>

I think that if you want to do like in your linked picture, you should make the red/yellow/blue also in an absolute position, and then specify a z-index property for them, so you can pick the order of the "layers".

Basically I'd write that:

.box{
    width:150px;
    height:150px;
    position: absolute;
}

.red{
    background:#bf1900;
    top: 50px;
    left: 50px;
    z-index: 1;
}
.yellow{
    background:#bfa900;
    top: 150px;
    left: 150px;
    z-index: 2;
}
.blue{
    background:#1d00bf;
    top: 100px;
    left: 100px;
    z-index: 3;
}

Just play with postion property and either margin or top/left property. I have used margin just for display purpose.

 .box{ width:150px; height:150px; }.small-box{ width:50px; height:50px; position:absolute; margin: 30px 0px 10px 10px; }.red { background:#bf1900; margin-top: 20px; }.yellow{ background:#bfa900; margin-left: 35px; margin-top: 40px; }.blue{ background:#1d00bf; margin-left: 25px; }.green{ width: 100%; height: 100px; background:#00700f; position: absolute; bottom: 0; }.black{ background: black; position: absolute; top: 0; right: 0; width: 250px; }
 <html> <head> <link rel="stylesheet" href="style.css"> </head> <body> <div class="small-box red"></div> <div class="small-box yellow"> </div> <div class="small-box blue"> </div> <div class="box green">Always on the bottom with 100% width</div> <div class="box black"><font color="white">Always on the right top</font></div> </body> </html>

One way of approaching this is by setting the position to absolute and then adjust the positioning for each div.

Try this one below.

.box{
  position:absolute;
    width:150px;
    height:150px;
}

.red{
    background:#bf1900;
  top: 1.5em;
  left: 1.1em;
}
.yellow{
    background:#bfa900;
  top:3em;
  left: 2em;
}
.blue{
    background:#1d00bf;
  top: 5em;
  left: 3em;
}
.green{
    width: 100%;
    height: 100px;
    background:#00700f;
    position: absolute;
    bottom: 0;
  color: white;
}
.black{
    background: black;
    position: absolute;
    top: 0;
    right: 0;
    width: 250px;
}

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