| <!DOCTYPE html> | |
| <canvas id="output" width="100" height="100" style="background: blue;"></canvas> | |
| <script> | |
| "use strict"; | |
| const canvas = document.getElementById('output'); | |
| const ctx = canvas.getContext('2d'); | |
| ctx.fillStyle = 'green'; | |
| ctx.fillRect(0, 0, 100, 100); | |
| </script> |