<!DOCTYPE html>
<style>
.container1 {
  width: 200px;
  height: 200px;
  background-image: url("../support/green.png"), url("../support/red.png");
  background-size: 100px 100px;
  background-repeat: no-repeat;
  background-color: rgb(0, 0, 199);
}
.container2 {
  width: 200px;
  height: 200px;
  background-image: url("../support/green.png"), url("../support/red.png");
  background-size: 100px 100px;
  background-repeat: no-repeat;
}
.container3 {
  width: 100px;
  height: 100px;
  background-image: url("../support/green.png"), url("../support/red.png");
}
</style>
</style>
<body>
  <div class="container1"></div>
  <div class="container2"></div>
  <div class="container3"></div>
  <div class="container3"></div>
</body>
