na s

body {
  margin: auto;
}

.container {
  margin: auto;
  margin-top: 10px;
  width: 800px;
  height: 795px;
  background-color: cyan;
  padding: 5px;
}

.s1 {
  margin: auto;
  margin-top: 5px;
  width: 750px;
  height: 100px;
  background-color: red;
  border: 5px solid black;
}

.container2 {
  margin: auto;
  margin-top: 5px;
  width: 790px;
  height: 100px;
  background-color: cyan;
  padding: 5px;
}

.s2 {
  float: left;
  margin-left: 15px;
  margin-top: 5px;
  width: 450px;
  height: 100px;
  background-color: yellow;
  border: 5px solid black;
}

.s3 {
  float: right;
  margin-right: 15px;
  margin-top: 5px;
  width: 270px;
  height: 100px;
  background-color: pink;
  border: 5px solid black;
}

.s4 {
  float: right;
  margin-right: 20px;
  margin-top: 15px;
  width: 270px;
  height: 270px;
  background-color: orange;
  border: 5px solid black;
}

.container3 {
  float: left;
  margin-left: 20px;
  margin-top: 15px;
  width: 441px;
  height: 260px;
  background-color: white;
  border: 5px solid black;
  padding: 5px;
}

.s5 {
  margin-left: 8px;
  float: left;
  margin-top: 8px;
  width: 195px;
  height: 100px;
  background-color: blue;
  border: 5px solid black;
}

.s6 {
  margin-right: 7px;
  float: right;
  margin-top: 8px;
  width: 195px;
  height: 100px;
  background-color: red;
  border: 5px solid black;
}

.s7 {
  margin: auto;
  margin-top: 135px;
  width: 417px;
  height: 100px;
  background-color: yellow;
  border: 5px solid black;
}

.s8 {
  margin-left: 20px;
  float: left;
  margin-top: 15px;
  width: 210px;
  height: 100px;
  background-color: black;
  border: 5px solid white;
}

.s9 {
  margin-left: 20px;
  float: left;
  margin-top: 15px;
  width: 210px;
  height: 100px;
  background-color: red;
  border: 5px solid black;
}

.s10 {
  margin-left: 20px;
  float: left;
  margin-top: 15px;
  width: 270px;
  height: 100px;
  background-color: pink;
  border: 5px solid black;
}

.s11 {
  margin-left: 20px;
  float: left;
  margin-top: 15px;
  width: 360px;
  height: 100px;
  background-color: yellow;
  border: 5px solid black;
}

.s12 {
  margin-right: 20px;
  float: right;
  margin-top: 15px;
  width: 360px;
  height: 100px;
  background-color: orange;
  border: 5px solid black;
}