let petY = 50

let velocity

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(220);

​

   if (petY > 350) {

    petY = 350

     velocity = 0

  } else {

    petY = petY - velocity

  }

  if (mouseIsPressed && mouseX > petX - 1 && mouseX < mouseX + 51 && mouseY > petY - 1 && mouseY < petY + 51 || mouseX == mouseX && mouseY == petY) {

  petX = mouseX

  petY = mouseY

  velocity = 0

} else {

  if (velocity > -16) {

    velocity = velocity - 1

  } else {

   velocity = -15

  }

}

square(petX, petY, 50)

​

}