public class JBigRaster extends JRaster {
  private int nPixels;
  public JBigRaster() { 
    this(10);
  }
  public JBigRaster(int numberOfPixels){
    super(600,600);
    nPixels=numberOfPixels;

  }
  public JBigRaster(int numberOfPixels, int w, int h){
    super(w,h);
    nPixels=numberOfPixels; 
  }
  public void set(double x, double y, int color) {
    double xStart=x*nPixels;
    double yStart=y*nPixels;
    for (int i=0; i<nPixels; i++){
      for (int j=0; j<nPixels; j++){
        super.set(xStart+i,yStart+j, color);
      }
    }
  }
}