createCanvas(400, 400);

}

​

function draw() {

  background(100, 100, 145);

  rectMode(CENTER);

  fill(220, 100, 100);

  noStroke();

  strokeWeight(50);

  rect(180, 200, 100, 100);

​

  fill(200, 10, 100, 150);

  strokeWeight(5);

  stroke(200, 300, 100);

  ellipse(mouseX, mouseY, 100, 100);

  if mousePressed 

  {

    let ellipse(200, 250, 100, 100);

  }

  //R G B A (A= Opacity)

  //rect(x, y, w, h)

  //triangle... each pair is xy for point

}