Código Java (Design2.java):
package design;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import javax.swing.Timer;
public class Design2 extends javax.swing.JFrame {
Trazador t;
public Design2() {
initComponents();
this.setLocationRelativeTo(null);
t = new Trazador(
jPanel1.getGraphics(),
jPanel1.getWidth(),
jPanel1.getHeight(),
0);
Timer timer = new Timer(100, (ActionEvent e) -> {
int a = 0;
int b = 0;
t.salta(245, 300);
while (true) {
for (int i = 0; i < 4; i++) {
t.avanza(80);
t.gira(90);
}
t.gira(15);
a++;
if (a >= 390 / 15) {
t.avanza(50);
a = 0;
b++;
if (b >= 12) {
break;
}
}
}
});
timer.start();
timer.setRepeats(false);
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Design 2 - 2020");
setMinimumSize(new java.awt.Dimension(450, 450));
setPreferredSize(new java.awt.Dimension(300, 300));
setResizable(false);
getContentPane().setLayout(new java.awt.GridLayout(1, 0));
jPanel1.setBackground(new java.awt.Color(0, 0, 0));
jPanel1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jPanel1MouseClicked(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 643, Short.MAX_VALUE)
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 488, Short.MAX_VALUE)
);
getContentPane().add(jPanel1);
getAccessibleContext().setAccessibleName("");
pack();
}// </editor-fold>
private void jPanel1MouseClicked(java.awt.event.MouseEvent evt) {
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Design2().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JPanel jPanel1;
// End of variables declaration
private static class Trazador {
double x, y, angulo;
Graphics g;
private Trazador(Graphics g, float x, float y, float angulo) {
this.x = x;
this.y = y;
this.angulo = angulo * Math.PI / 180;
this.g = g;
Graphics2D g2 = (Graphics2D) g;
g2.setStroke(new BasicStroke(0.3f));
g2.setColor(Color.YELLOW);
g2.setRenderingHint(
RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
}
public void gira(double angulo) {
this.angulo += angulo * Math.PI / 180;
}
public void avanza(double distancia) {
double x2 = x + distancia * Math.cos(angulo);
double y2 = y - distancia * Math.sin(angulo);
g.drawLine((int) x2, (int) y2, (int) x, (int) y);
salta(x2, y2);
}
public void salta(double x, double y) {
this.x = x;
this.y = y;
}
}
}
Resultado:
