This code creates a rectangle with a red color and adds it to the scene. The renderer then draws the scene onto the screen. Example 2: Drawing a Circlec++ Entity::Circle circle(200, 200, 25); Entity::Gradient gradient(Entity::Color(0, 255, 0), Entity::Color(0, 0, 255)); circle.setFillGradient(gradient); scene.addEntity(circle); renderer.render(scene); ``` This code creates a circle with a gradient color fill (green to blue) and adds it to the scene. The renderer then draws the scene onto the screen. The Entity Draw library is based on the Qt framework and requires the Qt libraries to be installed.