​

let angleIncrement = Number(prompt("Enter angle increment:"));

​

let sizeIncrement = Number(prompt("Enter size increment:"));

​

let txtSize = 30;

​

​

​

​

function setup() {

  createCanvas(800, 800);

  background(0);

}

​

let x = 0,

  index = 1,

  angle = 0;

​

​

​

​

function draw() {

  // background(0, 50);

  let lineAlpha = 20;

  textSize(txtSize);

  fill(255);

  noStroke();

  text("Num: " + number.toString(), 10, txtSize + 5);

  text("Angle: " + angleIncrement.toString(), 10, txtSize * 2 + 10);

​

​

  x += 1 * index * sizeIncrement;

  angle += angleIncrement;

​

  if(x > number * sizeIncrement) index = -1;

  if(x < 0) index = 1;

  lineAlpha = x - angleIncrement < 0 ? 0 : 20;

  // stroke(random(0,255), random(0,255), random(0,255), lineAlpha); 

  // stroke(0, 255, 0, lineAlpha);

  stroke(255, lineAlpha);

  translate(width / 2, height / 2);

  rotate(radians(angle));

  line(0, 0, x, x);

}

​

​

​

​

let paused = false;

​

function mouseClicked() {

  if(!paused) {

    frameRate(0);

    paused = true;

  }

  else if(paused) {

    frameRate(10000);

    paused = false;

  }

}