/*  regole generali della pagina */
* {
  margin: 0;
  padding: 0;
  border: 0;
  box-sizing: border-box;
}

.square {
  width:70px;
	height:70px;
  border: black solid 0.5px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 20px;
}

.linea {
  display: flex;
}

.yellow {
  background-color: yellow;
}
.green {
  background-color: green;
}