xxxxxxxxxx
/**src/App.css**/
.bg{
background-color: #03f4fc;
}
/**src/App.js**/
function App() {
return (
<>
<Container>
<Row className="bg">
<Col className="border">1 of 2</Col>
<Col className="border">2 of 2</Col>
</Row>
<Row className="bg">
<Col className="border">1 of 3</Col>
<Col className="border">2 of 3</Col>
<Col className="border">3 of 3</Col>
</Row>
</Container>
</>
);
}