How to use the blob.png function in blob

//Make the blobs
  let numberOfBlobs = 6,
      spacing = 48,
      xOffset = 150,
      speed = 2,
      direction = 1;

  //An array to store all the blob monsters
  blobs = [];

  //Make as many blobs as there are `numberOfBlobs`
  for (let i = 0; i < numberOfBlobs; i++) {

    //Make a blob
    let blob = new Sprite(id["blob.png"]);

    //Space each blob horizontally according to the `spacing` value.
    //`xOffset` determines the point from the left of the screen
    //at which the first blob should be added
    let x = spacing * i + xOffset;

    //Give the blob a random y position
    let y = randomInt(0, app.stage.height - blob.height);

    //Set the blob's position
    blob.x = x;
    blob.y = y;

    //Set the blob's vertical velocity. `direction` will be either `1` or
    //`-1`. `1` means the enemy will move down and `-1` means the blob will
    //move up. Multiplying `direction` by `speed` determines the blob's

//Make the exit door
  door = new Sprite(id["door.png"]); 
  door.position.set(32, 0);
  stage.addChild(door);

  //Make the blobs
  let numberOfBlobs = 6,
      spacing = 48,
      xOffset = 150;

  //Make as many blobs as there are `numberOfBlobs`
  for (let i = 0; i < numberOfBlobs; i++) {

    //Make a blob
    let blob = new Sprite(id["blob.png"]);

    //Space each blob horizontally according to the `spacing` value.
    //`xOffset` determines the point from the left of the screen
    //at which the first blob should be added.
    let x = spacing * i + xOffset;

    //Give the blob a random y position
    //(`randomInt` is a custom function - see below)
    let y = randomInt(0, stage.height - blob.height);

    //Set the blob's position
    blob.x = x;
    blob.y = y;

    //Add the blob sprite to the stage
    stage.addChild(blob);

//Make the exit door
  door = new Sprite(id["door.png"]);
  door.position.set(32, 0);
  stage.addChild(door);

  //Make the blobs
  var numberOfBlobs = 6,
      spacing = 48,
      xOffset = 150;

  //Make as many blobs as there are `numberOfBlobs`
  for (var i = 0; i < numberOfBlobs; i++) {

    //Make a blob
    var blob = new Sprite(id["blob.png"]);

    //Space each blob horizontally according to the `spacing` value.
    //`xOffset` determines the point from the left of the screen
    //at which the first blob should be added.
    var x = spacing * i + xOffset;

    //Give the blob a random y position
    //(`randomInt` is a custom function - see below)
    var y = randomInt(0, stage.height - blob.height);

    //Set the blob's position
    blob.x = x;
    blob.y = y;

    //Add the blob sprite to the stage
    stage.addChild(blob);

//Make the blobs
  var numberOfBlobs = 6,
      spacing = 48,
      xOffset = 150,
      speed = 2,
      direction = 1;

  //An array to store all the blob monsters
  blobs = [];

  //Make as many blobs as there are `numberOfBlobs`
  for (var i = 0; i < numberOfBlobs; i++) {

    //Make a blob
    var blob = new Sprite(id["blob.png"]);

    //Space each blob horizontally according to the `spacing` value.
    //`xOffset` determines the point from the left of the screen
    //at which the first blob should be added
    var x = spacing * i + xOffset;

    //Give the blob a random y position
    var y = randomInt(0, stage.height - blob.height);

    //Set the blob's position
    blob.x = x;
    blob.y = y;

    //Set the blob's vertical velocity. `direction` will be either `1` or
    //`-1`. `1` means the enemy will move down and `-1` means the blob will
    //move up. Multiplying `direction` by `speed` determines the blob's

//Make the exit door
  door = new Sprite(id["door.png"]); 
  door.position.set(32, 0);
  app.stage.addChild(door);

  //Make the blobs
  let numberOfBlobs = 6,
      spacing = 48,
      xOffset = 150;

  //Make as many blobs as there are `numberOfBlobs`
  for (let i = 0; i < numberOfBlobs; i++) {

    //Make a blob
    let blob = new Sprite(id["blob.png"]);

    //Space each blob horizontally according to the `spacing` value.
    //`xOffset` determines the point from the left of the screen
    //at which the first blob should be added.
    let x = spacing * i + xOffset;

    //Give the blob a random y position
    //(`randomInt` is a custom function - see below)
    let y = randomInt(0, app.stage.height - blob.height);

    //Set the blob's position
    blob.x = x;
    blob.y = y;

    //Add the blob sprite to the stage
    app.stage.addChild(blob);

//Make the blobs
  let numberOfBlobs = 6,
      spacing = 48,
      xOffset = 150,
      speed = 2,
      direction = 1;

  //An array to store all the blob monsters
  blobs = [];

  //Make as many blobs as there are `numberOfBlobs`
  for (let i = 0; i < numberOfBlobs; i++) {

    //Make a blob
    let blob = new Sprite(id["blob.png"]);

    //Space each blob horizontally according to the `spacing` value.
    //`xOffset` determines the point from the left of the screen
    //at which the first blob should be added
    let x = spacing * i + xOffset;

    //Give the blob a random y position
    let y = randomInt(0, stage.height - blob.height);

    //Set the blob's position
    blob.x = x;
    blob.y = y;

    //Set the blob's vertical velocity. `direction` will be either `1` or
    //`-1`. `1` means the enemy will move down and `-1` means the blob will
    //move up. Multiplying `direction` by `speed` determines the blob's