editor,

  script,

  tokens;

​

function setup() {

  createCanvas(400, 400);

  angleMode(DEGREES);

  turtle = new Turtle(width / 2, height / 2, 0);

  editor = select("#script");

  editor.input(goTurtle);

  strokeWeight(2);

  stroke(233);

}

​

function goTurtle() {

  resetMatrix();

  turtle.reset();

  script = editor.value();

  tokens = script.trim().split(/\s/);

  background(22);

  for (let i = 0; i < tokens.length; i++) {

    if (commands[tokens[i]] && tokens[i + 1]) {

      i += commands[tokens[i]](tokens[i + 1]);

    }

  }

}