static float blinkingRedText_fontSize = 80f;

import java.awt.font.*;
import java.awt.geom.*;

static JWindow blinkingRedText(fS text, final int howOften) {
  ret swing(func -> JWindow {
    JPanel panel = singleColorPanel(Color.RED);
    new JWindow w;
    w.add(panel);
    w.setAlwaysOnTop(true);
    w.setVisible(true);
    
    TextLayout tl = new TextLayout(text, w.getFont().deriveFont(Font.BOLD, blinkingRedText_fontSize),
      ((Graphics2D) w.getGraphics()).getFontRenderContext());
    Rectangle2D r = tl.getBounds();
    new AffineTransform tx;
    tx.translate(0, r.getHeight());
    Shape outline = tl.getOutline(tx);
    centerWindow(w, iceil(r.getWidth()), iceil(r.getHeight()));
    w.setShape(outline);
    blinkWindowUsingSize(w, howOften);
    ret w;
  });
}

Began life as a copy of #1013348