Ex #8-1

let circleW = 200;

let circleX, circleY;

let circleC =255;

let on = true;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  circleX = width/2;

  circleY = height/2;

}

​

function draw() {

background(circleC);

noStroke();

fill(255, 251, 205 );

ellipse(circleX, circleY,circleW, circleW)  

  }

​

function mousePressed(){

  let d = dist(mouseX, mouseY, circleX, circleY);

  if(d < circleW/2){

  if(on == true){

    circleC = 0;

    on = false;

  }else{

    circleC = 255;

    on =true;

  }

  }

}

​

​

/*console.log("click");*/