.main-block {
    width: 300px;
    height: 300px;
    border: 1px solid black;
    position: relative; 
  }
  
.house {
  width: 150px;
  height: 150px;
  background: coral;
  position: relative;
  top: 50%;
  left: 25%;
  z-index: -1; 
}
  
.roof {
  width: 0;
  height: 0;
  border-left: 110px solid transparent;
  border-right: 110px solid transparent;
  border-bottom: 100px solid red;
  position: absolute;
  bottom: 50%; 
  left: 12.5%;
}
  
.chimney {
  width: 20px;
  height: 60px;
  background: black;
  position: absolute;
  top: 60px;
  right: 30%; 
}
  
.door {
  width: 60px;
  height: 90px;
  background: brown;
  position: absolute;
  bottom: 0; 
  left: 50%; 
}
  
.window {
  width: 40px;
  height: 40px;
  background: cyan;
  position: absolute;
  top: 75%;
  right: 55%; 
}