sketch.js

var fixedRect, movingRect;


function setup() {
  createCanvas(1200,800);
  fixedRect = createSprite(200,200,50,80);
  fixedRect.shapeColor = "green";
  movingRect = createSprite(400,200,80,30);
  movingRect.shapeColor = "green";
}

function draw() {
  background(0,0,0);  
  movingRect.x = World.mouseX;
  movingRect.y = World.mouseY;

  if (movingRect.x - fixedRect.x < fixedRect.width/2 + movingRect.width/2
    && fixedRect.x - movingRect.x < fixedRect.width/2 + movingRect.width/2
    && movingRect.y - fixedRect.y < fixedRect.height/2 + movingRect.height/2
    && fixedRect.y - movingRect.y < fixedRect.height/2 + movingRect.height/2) {
    
  movingRect.shapeColor = "red";
  fixedRect.shapeColor = "red";
}
else {
  movingRect.shapeColor = "green";
  fixedRect.shapeColor = "green";
}
  drawSprites();
}