body {
  background-color: lightgray;
}

.painting {
  width: 700px;
  height: 700px;
  background-color: white;
  position: relative;
  margin: 50px;
}

.red-top {
  width: 150px;
  height: 120px;
  background-color: red;
  position: absolute;
  top: 0;
  left: 0;
}

.red-middle {
  width: 150px;
  height: 140px;
  background-color: red;
  position: absolute;
  top: 130px;
  left: 0;
}

.yellow {
  width: 30px;
  height: 520px;
  background-color: yellow;
  position: absolute;
  top: 130px;
  right: 0;
}

.blue {
  width: 270px;
  height: 50px;
  background-color: blue;
  position: absolute;
  bottom: 0;
  left: 160px;
}

/* white areas */

.white-left {
  width: 150px;
  height: 400px;
  background-color: white;
  position: absolute;
  top: 280px;
  left: 0;
}

.white-main {
  width: 520px;
  height: 520px;
  background-color: white;
  position: absolute;
  top: 130px;
  left: 160px;
}

.white-bottom {
  width: 250px;
  height: 50px;
  background-color: white;
  position: absolute;
  bottom: 0;
  right: 0;
}


.line-horizontal-top {
  width: 700px;
  height: 10px;
  background-color: black;
  position: absolute;
  top: 120px;
  left: 0;
}

.line-horizontal-middle {
  width: 160px;
  height: 20px;
  background-color: black;
  position: absolute;
  top: 270px;
  left: 0;
}

.line-horizontal-bottom {
  width: 540px;
  height: 10px;
  background-color: black;
  position: absolute;
  bottom: 50px;
  left: 160px;
}

.line-vertical-left {
  width: 10px;
  height: 700px;
  background-color: black;
  position: absolute;
  top: 0;
  left: 150px;
}

.line-vertical-middle {
  width: 20px;
  height:50px;
  background-color: black;
  position: absolute;
  left:420px;
  bottom:0;
}

.line-vertical-right {
  width: 10px;
  height: 580px;
  background-color: black;
  position: absolute;
  top: 120px;
  right: 30px;
}