App.js

// App.js
...
export default function App() {
  const color = '#FFC77D';

  const data = [
    {"duration": 4, column: 0},
    {"duration": 7, column: 1},
    {"duration": 6, column: 2},
    {"duration": 7, column: 3},
    {"duration": 8, column: 4},
    {"duration": 5, column: 5},
    {"duration": 8, column: 6},
  ];

  return (
...
    
      <BarGraph
        color={color}
        data={data} />
...