Junnan Grab - OpenProcessing

mySketch
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ballx = 50;
bally = 50;
​
ballSize = 100;
grabbing = false;
​
function setup() {
  createCanvas(windowWidth, windowHeight);
  background(100);
}
​
function draw() {
  background(100);
  
  let d = dist(mouseX, mouseY, ballx, bally);
  
  if (d < ballSize/2) {
    grabbing = true;
  } else if (grabbing & d < ballSize) {
    grabbing = true;
  } else {
    grabbing = false;
  }
  
  if (grabbing) {
    ballx = mouseX; 
    bally = mouseY;
    fill(255, 10);
    ellipse(ballx, bally, ballSize*2);
  }
  
  fill(255);
  ellipse(ballx, bally, ballSize);
}