Block Code Turtle Art Unblocked

Block Code Turtle Art hands you a pen attached to a turtle and a black canvas to draw on. The turtle, shown as a small circle with a pointer, knows only a few commands: move forward, turn, lift or lower the pen, and change color. Each level fades in a ghostly guide image for you to copy. What makes it satisfying is the shortcut hiding in every shape, since a loop of two blocks can draw what would otherwise take dozens. It is part of Google’s Blockly Games and plays unblocked right here.

Drawing by Instructions

A one-line brief starts each stage, such as asking you to make a square appear. Choose blocks from the category list next to the workspace, stack them up, then hit Run Program. White lines appear as the turtle walks, and a slider decides how quickly: the turtle icon end is slow, the rabbit end is quick.

Cover the guide correctly and the stage counts as finished, with a pop-up revealing the JavaScript your blocks represent. Missed it? Hit Reset, tweak a value or shuffle the order, and give it another go.

The progression covers a lot of geometry in ten steps. You begin with four equal sides, then five. Next are stars made from a tiny number of blocks, a group of four stars placed at the corners of a square, and yellow stars linked by white lines. Later you build a full moon out of 360 white lines, then turn it into a crescent. Level 10 drops the guide entirely and fills the toolbox with extra categories, including logic, math, lists, variables and functions.

Block Code Turtle Art controls

To do this	Mouse	Touch
Open a group of blocks	Click Turtle, Loops or another category name	Tap the category name
Assemble the drawing program	Drag blocks into the workspace and snap them together	Drag blocks with your finger
Adjust a distance, angle or color	Click the value on a block and pick a new one	Tap the value and pick a new one
Draw, or wipe the canvas	Click Run Program, then Reset	Tap Run Program, then Reset
Set how fast the turtle draws	Drag the slider between the turtle and rabbit icons	Slide the speed control

The Geometry Behind Each Shape

Regular polygons. The turtle has to turn a full 360 degrees to face its starting direction again. Split 360 into as many parts as the shape has sides and that is your turn: 90 for a square, 72 for a pentagon, 60 for a hexagon. Put one move and one turn inside a repeat block set to the number of sides.

Stars. A star is a polygon that overshoots. With five points, each turn is 144 degrees, and the total of 720 degrees means the turtle loops twice around the center.

Shapes in a pattern. To place four stars at the corners of a square, put your star loop inside a second loop that moves the turtle along one side and turns 90 degrees. Use pen up before moving between stars, so no stray line connects them.

Curves and moons. Anything round needs many repetitions, which is why the moon levels lean on a 360-step loop. For the crescent, the trick is covering part of the moon with a black shape rather than drawing two curves.

When a picture comes out wrong, slow the turtle right down. Seeing each stroke appear one at a time shows you exactly which line veers off course.

Good for Art Fans and Math Fans Alike

The game appeals to two kinds of players: people who like making pictures, and people who like seeing why the numbers work. Both get a reward on the free level. If you enjoy creating images, Pixel Sketch Studio is a relaxed drawing tool, while Tangram keeps the focus on shapes and angles.