Spiro

/**
 * author: @fabiantheblind
 * This script creates a graphic line in circles
 * based on this processing sketch by PhiLho
 * http://forum.processing.org/topic/how-can-i-draw-this#25080000000995029
 * source: https://github.com/ExtendScript/wiki/wiki/Spiro
 */

// the size of the page
var ph = 150;
var pw = 150;

        // we need a doc
      // use pw and phas size
var doc = app.documents.add({
  documentPreferences: {
    pageHeight: ph,
    pageWidth: pw
  }
});

      // the page is already there
var page = doc.pages.item(0);
      // get the center of the page
var cx = pw / 2;
var cy = ph / 2;
      // define the initial radius
var init_rad = 0.9 * (pw / 2);
var radius = init_rad;
      // this is the amplitude fpr the disturb
var amplitude = radius / 1;

      // create a graphicLine
var gl = page.graphicLines.add();
var radians_angle; // this will hold the angle in radians
var rounds = 75; // how many rounds

    // ~   we need to count the path points.
    // ~   the first an second always exist in  a graphic line
var count = 0;
var degree_step = 4;

      // loop through the data.anchors

for(var degrees = 0; degrees < 360 * rounds; degrees += (360 / degree_step)) {

          // calculate the degree to radians
  radians_angle = ((degrees / 360) % 360) * 2 * Math.PI;
        // get the point
  var point = gl.paths[0].pathPoints[count];
         // set the disturb to 0 if you want straight lines
        // calc the position on the circle
  var x1 = cx + (radius) * Math.cos(radians_angle);
  var y1 = cy + (radius) * Math.sin(radians_angle);
  radius -= 0.2;
          /**
           * a graphicLine always has 2 path points
           * so we need to add points only from the third index
           *
           */
  if(count < 2) {

    point.anchor = [x1, y1];

    if(count % 4 === 0) {
      point.rightDirection = [x1, y1 + radius];
    }
    if(count % 4 === 1) {
      point.rightDirection = [x1 - radius, y1];
    }
    if(count % 4 === 2) {
      point.rightDirection = [x1, y1 - radius];
    }
    if(count % 4 === 3) {
      point.rightDirection = [x1 + radius, y1];
    }

  }else{
    point = gl.paths[0].pathPoints.add();
    point.anchor = [x1, y1];
    if(count % 4 === 0) {
      point.rightDirection = [x1, y1 + radius];
    }
    if(count % 4 === 1) {
      point.rightDirection = [x1 - radius, y1];
    }
    if(count % 4 === 2) {
      point.rightDirection = [x1, y1 - radius];
    }
    if(count % 4 === 3) {
      point.rightDirection = [x1 + radius, y1];
    }
  }

            // now make the circle smaller by every round
            // if(degrees%360 == 0)radius-= ((init_rad)/rounds );
  count++;
}