Create a PDF file and draw to the screen

PDF_Example_01.pde

import processing.pdf.*;  // Import PDF code

void setup() {
  size(600, 600);
  noLoop();  // Run the draw() only once
}

void draw() {
  beginRecord(PDF, "line.pdf");  // Start writing to PDF
  // START PATTERN
  background(255);  
  strokeWeight(10);
  for (int y = 100; y < height; y += 100) {                
    line(200, y, 400, y);  // Draw lines to screen and to PDF
  }
  // STOP PATTERN
  endRecord();  // Stop writing to PDF
}