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size (200, 200);
// a line of ellipses going down the screen
for (int y = 10; y < height; y = y+ 15) {
fill (255, 0, 0); // red
ellipse (20, y, 10, 10);
}
// a line of ellipses going to the right side of scree
for (int x = 40; x < width; x = x + 15) {
fill (0, 0, 0); // black
ellipse (x, 10, 10, 10);
}