GRAPHICS ======== The center of the graphics window is turtle location [0 0]. Positive X is to the right; positive Y is up. Headings (angles) are measured in degrees clockwise from the positive Y axis. (This differs from the common mathematical convention of measuring angles counterclockwise from the positive X axis.) The turtle is represented as an isoceles triangle; the actual turtle position is at the midpoint of the base (the short side). TURTLE MOTION QUERIES --------------------- POS outputs the turtle's current position, as a list of two numbers, the X and Y coordinates. HEADING outputs a number, the turtle's heading in degrees. CONTROL STRUCTURES ================== WAIT time command. Delays further execution for time 60ths of a second. Also causes any buffered characters destined for the terminal to be printed immediately. WAIT 0 can be used to achieve this buffer flushing without actually waiting. WORKSPACE MANAGEMENT ==================== WORKSPACE CONTROL ----------------- SAVEL contentslist filename command. Saves the definitions of the procedures, variables, and property lists specified by contentslist to the file named filename. Example: SAVEL "INITIALS "W:/INITIALS.TXT SETEDITOR path command. Tells Logo to use the specified program as its editor instead of the default editor. The format of a path depends on your operating system. Example: SETEDITOR "C:/WINNT/NOTEPAD.EXE