Amazonas Tortuga


Amazonas Tortuga presents more than 30 shape challenges to the learner that must be completed using basic Logo-blocks. The challenges are based on artwork of the Amazonas Region in Peru.

Amazonas Tortuga is a fork of Activities/Turtle Confusion that presents 40 shape challenges to be programmed by moving the Logo turtle.


Additional features:

  • You can import challenges from the Sugar Journal (save them as an image file)
  • You can save your results as: (1) a Turtle Art program; (2) a UCB Logo project; or (3) a PNG image
  • You can overlay Cartesian and polar coordinate grids
  • Additional blocks can be added through the Turtle Blocks plugin mechanism

Where to get Amazonas Tortuga

Amazonas Tortuga activity is available for download from the Sugar Activity Library: Amazonas Tortuga

The source code is available on GitHub.

How to play Amazonas Tortuga

  1. Select a challenge from the Combo Box (Shown above: ‘amazonas 30’).
  2. Use blocks from the various palettes to instruct the Logo turtle to replicate the pattern.

Please refer to the Activities/Turtle Art pages for basic instructions on how to use the block interface and the details of various toolbars.

The shape challenges are loaded from the Combo Box on the Project (Palette) toolbar. When you select a shape, it will be loaded onto the canvas. When you use the Erase button, the current shape is reloaded.

The available blocks are small subset of the Turtle Block blocks: the basic turtle blocks; a reduced palette of pen and color blocks; some basic arithmetic operators; the repeat block; and the action and box blocks.

The Export palette includes save as Logo; save as image; and save as Turtle Art.

What are the challenges?

The challenges are problems of symmetry and geometry which typically can be solved by using a combination of rotations and repeat blocks.

Challenge4 Challenge17 Challenge30 Challenge32
Challenge 4 Challenge 17 Challenge 30 Challenge 32

Where to report problems

Please report bugs and make feature requests at AmazonasTortuga/issues.


  • Walter Bender wrote and maintains the code.
  • Brian Silverman is the first author of Turtle Art.