PictoBlox Extensions
  1. Scratch Based Default Extensions
    1. Motion
    2. Looks
    3. Sound
    4. Control
    5. Events
    6. Sensing
    7. Operators
    8. My Blocks
    9. Variables
  2. Artificial Intelligence
    1. Face Detection
    2. Object Detection
    3. Human Body Detection
    4. Computer Vision
    5. Text Recognition
    6. Speech Recognition
    7. ChatGPT
    8. Natural Language Processing
    9. Recognition Cards
    10. Text to Speech
    11. Translate
    12. Open CV
  3. Innovative Extensions
    1. QR Code Scanner
    2. Weather Data
    3. Physics Engine
    4. IFTTT Webhooks
    5. Internet of Things (IoT)
    6. Data Logger
    7. Music
    8. Video Sensing
    9. Pen
  4. Machine Learning Environment
    1. Image Classifier (ML)
    2. Object Detection (ML)
    3. Pose Classifier (ML)
    4. Hand Pose Classifier (ML)
    5. Audio Classifier (ML)
    6. Number Classifier and Regression (ML)
    7. Text Classifier (ML)
  5. Quarky
    1. Quarky (Main)
    2. Display (Quarky)
    3. Robot (Quarky)
    4. Sensors (Quarky)
    5. Speaker (Quarky)
    6. Quarky Ultimate Robots
    7. Quarky Expansion Board
    8. Mars Rover
    9. Humanoid (Quarky)
    10. Quadruped (Quarky)
    11. IoT House (Quarky)
    12. Quarky Mecanum
    13. Quarky Robotic Arm
    14. Dabble
PictoBlox Extension

Pen

pen
Extension Description
Pen Extension allows sprites to control their pens, as well as stamp themselves onto the stage and remove all pen marks.
  • STEMpedia-Rocket-800x800 Available in: Block Coding, Python Coding
  • STEMpedia-Rocket-800x800 Mode: Stage Mode
  • STEMpedia-Rocket-800x800 WiFi Required: No
  • STEMpedia-Rocket-800x800 Compatible Hardware in Block Coding: evive, Quarky, Arduino Uno, Arduino Mega, Arduino Nano, ESP32, T-Watch, Boffin, micro:bit, TECbits, LEGO EV3, LEGO Boost, LEGO WeDo 2.0, Go DFA, None
  • STEMpedia-Rocket-800x800 Compatible Hardware in Python: evive, Quarky, Arduino Uno, Arduino Mega, Arduino Nano, ESP32, T-Watch, Boffin, micro:bit, TECbits, LEGO EV3, LEGO Boost, LEGO WeDo 2.0, Go DFA, None
  • STEMpedia-Rocket-800x800 Object Declaration in Python: pen = Pen()
  • STEMpedia-Rocket-800x800 Extension Catergory:

Introduction

The Pen Extension allows sprites to control their pens, as well as stamp themselves onto the stage and remove all pen marks. To use them, they must be enabled in the “Extensions” section of the editor.

Pen blocks are useful when creating a one sprite one script project, allowing the following actions to happen:

  1. Stamp the sprite
  2. Put the pen down
  3. Release the pen

One example of a one sprite one script project is a simple drawing program. The pen extension can also be used to make games, simulations, 3D projects, and other projects.

Making a Triangle

Read More

PictoBlox Blocks

When used in a script, the sprite will produce a bitmap image of itself which is stamped onto the stage. (Because it is merely a picture of the sprite and not a sprite itself, it cannot be programmed.) Like other Pen blocks, the Stamp block will not draw over sprites. The erase all block removes all stamped images.
The block removes all marks made by the pen or stamping. It is the only pen block that the Stage can use.
The block will make its sprite continuously pen a trail wherever it moves until the Pen Up block is used. The color, size, and transparency of the trail can be changed with other blocks.
If a sprite is currently using the pen because of the Pen Down block, the block will cause the sprite to stop drawing a trail. (Otherwise, it has no effect.)
The block sets the pen’s color to the given color, which can be selected by clicking on the input.
This block sets the pen’s color, saturation, brightness (also known as shade), and transparency. The first value can be selected from “color” (default), “saturation”, “brightness”, and “transparency”.
The block changes the specified value by the number input. 
The block sets the Pen Size to the given number. The pen draws a trail of circles. The diameter of the circle, in pixels, is equal to the pen size.
The block changes the pen size by the specified amount.
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Block Coding Examples

Air Draw

The example demonstrates how to use hand recognition and pen extensions to make an air draw game.

Ball Trajectory – Simple

The example demonstrates the ball falling in gravity in a box. Using the pen extension we are also tracking the trajectory of the ball.

Bouncing Ball – Coefficient of Restitution

In this example, we will analyze the effect of the bounce property of the sprite using a ball. We will track the ball using the pen extension and the color will change with the y velocity of the ball.

Stamping Tobi

The example demonstrates how to use stamping and the mouse location sensing in Block coding.
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Python Functions

stamp()
The function is used when the sprite needs to produce a bitmap image of itself which is stamped onto the stage. (Because it is merely a picture of the sprite and not a sprite itself, it cannot be programmed). The function will not draw over sprites. 
Syntax: stamp()
clear()
The function removes all marks made by the pen or stamping. It is the only pen block that the Stage can use.
Syntax: clear()
down()
The function will make its sprite continuously pen a trail wherever it moves until the up() function is used. The color, size, and transparency of the trail can be changed with other functions.
Syntax: down()
up()
If a sprite is currently using the pen because of the down() function, the up() function will cause the sprite to stop drawing a trail. (Otherwise, it has no effect.)
Syntax: up()
setcolor()
The function sets the pen’s color to the given color – (R, G, B).
Syntax: setcolor(color = [0, 0 , 0])
changecolor()
The function changes the specified value by the number input.
Syntax: changecolor(parameter = “color”, value = 10)
setsize()
The function sets the Pen Size to the given number. The pen draws a trail of circles. The diameter of the circle, in pixels, is equal to the pen size.
Syntax: setsize(size = 1)
changesize()
The function changes the pen size by the specified amount.
Syntax: changesize(size = 1)
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Python Coding Examples

Air Draw – Python

The example demonstrates how to use hand recognition and pen extensions to make an air draw game in the Python Coding Environment.

Mouse Tracking and Stamping – Python

The example demonstrates how to make the sprite track and stamp its image on the mouse when the space key is pressed in Python.
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