// then, move angle = 45; to the end of draw()

// what happens? how is this different from having it in setup()?

​

let angle;

​

function setup() {

  createCanvas(400, 400);

  colorMode(HSB);

  angleMode(DEGREES);

  rectMode(CENTER);

  angle = 45;

}

​

function draw() {

  background(20);

  noStroke();

  fill(100,0,80);

  translate(200,200);

  rotate(angle);

  square(0,0,100);

  angle = ?;

}

​

function mouseMoved() {

  angle = angle + 5;

}