Print yourself a scarf.

gistfile1.pde

import processing.pdf.*;
//set up some constants
Boolean pdfOut = true;//are we outputting to pdf or to screen?
float averageDistance = 72*2 ;//how far between points, in inches/72 or pixels depending on output
void setup() {
  background(255, 255, 255);
  if (pdfOut) {
    size(1684, 2383, PDF, "output.pdf");
  }
  else {
    size(1684, 2383);
  }
  noStroke();
  //stroke(255,255,255);
  fill(0, 0, 0);
  //noFill();
}
void draw() {
  ArrayList<ArrayList<Point>> listOfPointLists = new ArrayList<ArrayList<Point>>();
  listOfPointLists.add(makeStraightLine(0));
  listOfPointLists.add(duplicateLineAt(listOfPointLists.get(0), 0));
  for (int i=0; i<200;i++) {
    listOfPointLists.add(makeNextLine(listOfPointLists.get(i)));
  }
  ArrayList<Point> points = new ArrayList<Point>();
  for (ArrayList<Point> currentList : listOfPointLists) {
    for (Point pointToAdd :currentList) {
      if (! (pointToAdd.outOfBounds())) {
        points.add(pointToAdd);
      }
    }
  }
  for (Point addThisPoint:duplicateLineAt(listOfPointLists.get(0),height)) {
    points.add(addThisPoint);
  }
  for (Point addThisPoint:makeVerticalLines()) {
    points.add(addThisPoint);
  }
  for (Point aPoint:points) {//itterate over primary points
    Point closestPoint = points.get(0);
    Point SecondClosestPoint = points.get(1);
    for (Point bPoint:points) {//iterate over secondary points
      if (bPoint.y > aPoint.y) {//if the secondary point is below the primary point
        if (aPoint.distanceTo(bPoint) < aPoint.distanceTo(SecondClosestPoint)) {//if the distance to the secondary point 
          if (aPoint.distanceTo(bPoint) < aPoint.distanceTo(closestPoint)) {
            SecondClosestPoint = closestPoint;
            closestPoint = bPoint;
          }
          else {
            SecondClosestPoint = bPoint;
          }
        }
      }
    }
    //fill(255,255,255,aPoint.distanceTo(SecondClosestPoint)/2);
    if (closestPoint != points.get(0) && SecondClosestPoint != points.get(1) &&SecondClosestPoint != points.get(0)) {
      triangle(aPoint.x, aPoint.y, SecondClosestPoint.x, SecondClosestPoint.y, closestPoint.x, closestPoint.y);
    }
  }
  noLoop();
  if (pdfOut) {
    exit();
  }
  else {
    noLoop();
  }
}
ArrayList<Point> makeNextLine(ArrayList<Point> prevLine) {
  ArrayList<Point> pointsToReturn = new ArrayList<Point>();
  float currentX = 0;
  while (currentX < width) {//while we need new points
    float newX = currentX;
    Point nearestPointByX = prevLine.get(0);//make the nearest point the first one
    for (Point pointToTest : prevLine) {
      if (abs(pointToTest.x - newX) > abs(nearestPointByX.x - newX)) {
        nearestPointByX = pointToTest;
      }
    }
    float newY = nearestPointByX.y + random(2)*averageDistance;
    //add a random number to that points Y and store it in newY
    Point newPoint = new Point(newX, newY);//make the new point
    newPoint.drawThis();
    pointsToReturn.add(newPoint);//add the new point
    currentX = currentX + random(2)*averageDistance/4;//make a new point about averageDistance along
  }
  return pointsToReturn;//return dem points
}
ArrayList<Point> makeStraightLine(float yIn) {
  ArrayList<Point> pointsToReturn = new ArrayList<Point>();
  float currentX = 0;
  while (currentX < width) {
    pointsToReturn.add(new Point(currentX, yIn));
    currentX = currentX + random(2)*averageDistance;
  }
  return pointsToReturn;
}
ArrayList<Point> duplicateLineAt(ArrayList<Point> lineIn, float yIn) {
  ArrayList<Point> lineOut = new ArrayList<Point>();
  for (Point toMovePoint :lineIn) {
    Point movedPoint = new Point(toMovePoint.x, yIn);
    lineOut.add(movedPoint);
  }

  return lineOut;
}
ArrayList<Point> makeVerticalLines() {
  ArrayList<Point> pointsToReturn = new ArrayList<Point>();
  float currentY = 0;
  while (currentY < height) {
    pointsToReturn.add(new Point(0, currentY));
    pointsToReturn.add(new Point(width, currentY));
    currentY = currentY + random(2)*averageDistance;
  }
  return pointsToReturn;
}
class Point {
  String toString() {
    return "("+ x +"," + y +")";
  }
  float x;
  float y;
  int count;
  Point(float xIn, float yIn ) {
    x = xIn;
    y = yIn;
  }
  float distanceTo(Point secondPoint) {
    return sqrt(sq(x - secondPoint.x) + sq(y - secondPoint.y));
  }
  void drawThis() {
    //ellipse(x,y,10,10);
  }
  Boolean outOfBounds() {
    if ((x > width - 5 ||y>height -5||x<5)) {
      return true;
    }
    else {
      return false;
    }
  }
}