g.setColor(Color.green); // set the drawing pen to green
g.fillOval(0, 0, 60, 60); // draw the top left filled circle
g.drawString("One green circle", 0, 80); // write the string
// set the drawing pen to blue
// draw the top right filled circle
// write the string
// set the drawing pen to red
// draw the bottom left filled circle
// write the string
// set the drawing pen to magenta
// draw the bottom right filled circle
// write the string
