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Logo's most-known feature is the turtle (derived originally from a robot of the same name), [5] an on-screen "cursor" that shows output from commands for movement and small retractable pen, together producing line graphics. It has traditionally been displayed either as a triangle or a turtle icon (though it can be represented by any icon).
Simple GIF animations may also be produced with the GIFSAVE command. Jim Muller wrote The Great Logo Adventure , a complete Logo manual using MSWLogo as the demonstration language. FMSLogo evolved from MSWLogo : An Educational Programming Environment, a free, open source implementation of the Logo programming language for Microsoft Windows .
Turtle graphics are often associated with the Logo programming language. [2] Seymour Papert added support for turtle graphics to Logo in the late 1960s to support his version of the turtle robot, a simple robot controlled from the user's workstation that is designed to carry out the drawing functions assigned to it using a small retractable pen set into or attached to the robot's body.
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Some of the commands include Forward (moving the turtle forward the given number of steps), Right and Left (turning right and left, respectively, the given number of degrees), PU/Pen Up (move without drawing), PD/Pen Up (draw while moving), and Repeat (repeat all the commands inside the brackets the given number of times).
MSWLogo supports multiple turtle graphics, 3D computer graphics, and allows input from ports COM and LPT. It also supports a Windows interface, so input/output (I/O) is available through this GUI, and keyboard and mouse events can trigger interrupts.
Turtlestitch (stylized as TurtleStitch) is a free and open source platform (or web application) for generating and sharing patterns for embroidery machines. Turtlestitch is derived from educational programming languages such as Logo, Scratch and Snap! using the same jigsaw style programming paradigm [2] which offers simplicity suitable for novices but has powerful features, described as ‘low ...