​

function setup() {

  createCanvas(400, 400);

    textAlign(CENTER);

}

​

function draw() {

  background(0);

    if(mouseX>100 && mouseX<150 && mouseY>200 && mouseY<250 && mouseIsPressed) {

        background('orange');

    }

    fill('cyan');

    ellipse(100, 100, 50);

    if(dist(100, 100, mouseX, mouseY) < 25 && mouseIsPressed) {

        fill('red');

        textSize(20);

        text("Hi!", 100, 100);

    }

    fill('yellow');

    rect(100, 200, 50, 50);

}