Multiple If Statements

sketch.js

var canDraw = false;

function setup() {
  createCanvas(500,500);
  background(255,255,0);
  
}

function draw() {
  
  if (mouseY < 10) {
    background(255,255,255);
    canDraw = true;
  }
  
  if (mouseY > height - 10) {
    background(255,0,0);
    canDraw = false;  
  }
  
  if (canDraw == true) {
    ellipse(mouseX, mouseY, 10, 10);  
  
  }
  
}