* {
  margin: 0;
  padding: 0;
}

.mainContainer {
  width: 80%;
  height: 500px;
  background-color: hsl(250, 35%, 15%, 0.25);
  margin: 5% 10%;
  border: 5px dotted black;
  border-radius: 10px;
}

.student1,
.student2,
.student3,
.student4 {
  width: 250px;
  height: 250px;
  border: 2px solid black;
  display: inline-block;
  margin: 8% 2%;
  background-color: lightblue;
}

#h_uniform {
  width: 225px;
  height: 225px;
  background-color: pink;
}
#r_uniform {
  width: 225px;
  height: 225px;
  background-color: grey;
}

#p_bag,
#h_bag,
#r_bag,
#a_bag {
  width: 100px;
  height: 100px;
  background-color: blue;
}