import java.awt.*;
import ij.*;
import ij.gui.*;
import ij.process.*;
import ij.plugin.PlugIn;

/** This sample ImageJ plugin generates an RGB image. */
public class RedAndBlue_ implements PlugIn {

    public void run(String arg) {
        int w = 400, h = 400;
        ImageProcessor ip = new ColorProcessor(w, h);
        int[] pixels = (int[])ip.getPixels();
        int i = 0;
        for (int y = 0; y < h; y++) {
            int red = (y * 255) / (h - 1);
            for (int x = 0; x < w; x++) {
                int blue = (x * 255) / (w - 1);
                pixels[i++] = (255 << 24) | (red << 16) | blue;
            }
        }
        new ImagePlus("Red and Blue", ip).show();
    }

}