let step = 60;

let instructions = "F";

let rules;

​

function setup() {

  createCanvas(400, 400);

  rules = {

              p : rotate(PI/3),

              m : rotate(-PI/3),

              F : createSegment()

          }; 

}

​

function draw() {

  background(220);

  translate(width/2,height/2);

  string_to_curve(instructions);

}

​

function mousePressed() {

  print("mouse pressed")

  for (let i=0;i<iterations;i++){

   instructions.replace("F",F_rule())

  }

}

function createSegment(){

  print("createSegment")

  fill(0)

  beginShape();

  vertex(0, 0);

  vertex(step, 0);

  endShape();

}

​

​

function string_to_curve(_instr){

  print("string_to_curve")

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

   command = _instr.charAt(i);

   rules[command];

  }

​

}

​

function F_rule(){

  print("F_rule")

  return "FpFmmFpF"

}