​

​

let angle = 0;

​

​

function setup() {

  createCanvas(400, 400);

  angleMode(DEGREES);

  // rectMode(CENTER);

}

​

​

function draw() { 

  background(0);

  push(); //save

  translate(200, 200);

  rotate(-angle); 

  // scale(mouseX/100, mouseY / 100);

   // by default everything rotates at the origin (0, 0)

  scale(1, 1);

  stroke(255)

  fill(100, 100, 100);

  rect(0, 0, 100, 50); 

  pop(); // undo 

  angle = angle + 2;  

}