let G = 0;

  let B = 0;

​

function setup() {

  createCanvas(400, 400);

    background(220);

  frameRate(40000);

​

}

​

function draw() {

​

  stroke(0);

  fill(255,0,0)

  rect(200,0,200,25)

  fill(0,0,255)

  rect(0,0,200,25)

  if(mouseIsPressed && mouseX>200 && mouseY < 25){

    R=1;

    G=0;

    B=0;}

    if(mouseIsPressed && mouseX<200 && mouseY < 25){

    R=0;

    G=0;

    B=1;}

  if(mouseIsPressed && mouseY>25 && R == 1){

    noStroke()

    fill(255,0,0)

    circle(mouseX,mouseY,5)

  }

  if(mouseIsPressed && mouseY>25 && B == 1){

    noStroke()

    fill(0,0,255)

    circle(mouseX,mouseY,5)

  }

}