draw radius lines on a circle by p5.js

sea_urchin.js

function setup() {
  createCanvas(1000, 600);
  background(255);
  strokeWeight(5);
  smooth();

  var radius = 500;
  var centx = 500;
  var centy = 300;

  stroke(0, 10);
  noFill();
  ellipse(centx, centy, radius*2, radius*2);

  stroke(20, 50, 70);
  var x, y;

  for (var ang = 0; ang <= 360; ang += 5) {
    var rad = radians(ang);
    console.log('​setup -> rad', rad);
    x = centx + (radius * cos(rad));
    y = centy + (radius * sin(rad));
    line(centx, centy, x, y);
  }
}