createCanvas(400, 400);

​

// Draw a gray background

background(220);

​

// Start position of a shape that will move

let x = 50;

​

// Change the horizontal position of the shape over time

x++;

​

// Draw the shape

rect(x, 200, 50, 50);

​

// Describes mouse interaction

if(mouseX > x && mouseX < x + 50) {

  x = mouseX;

}

​

​

function setup() {

}

​

function draw() {

}