LOGO Third Assignment


Your assignment is to command the turtle to play a song and draw a matching picture. You must use the shapes part of LOGO to design two (2) new sprites or "shapes". See my example of ALABAMA for 3 sprites and the words printed with the song.

To create or edit a sprite, type SHAPES at the command line, then curser to shapes on your LOGO selection page. You will be presented with a page of sprites organized by number. 1 to 10 are not defined and are good ones to use. When at the correct shape number, press [Enter], and now you can change a shape or design a new one. Use arrow keys to move around the sprite grid, and [SPACE BAR] to toggle ON/OFF the pixels in the sprite. You are finished designing the sprite, press [Esc] key to return to your former location in LOGO.

This assignment will give you much chance for creativity. I'm purposely not giving you step by step instructions so that you will have to set a goal of making a song and picture and think through the turtle steps necessary to solve this problem that you created!

GENERAL HELP WITH MUSIC: To learn how to play a note see LOGO Commands one page back on this web site. You can rename a page like ALABAMA, rename it with NP "__, and use the note procedures already typed in on the Flip Page or type in the notes and durations as in the LOGO Commands. The key command is TONE ff dd ff stands for the frequency of the note and dd is the duration usually 5 or 10. Set up Note procedures as follows:

The note D of fixed length
TO D
TONE 587 10 the second number is the duration in 1/20th of a sec.
END
The note D note of variable length
TO DV :L
TONE 587 :L Note :L is the length of the note
END On the command line you play this note by making L some value and then typing: DV 10

A D# sharp:
TO DS
TONE 622 10
END
You can play many notes on a single line. This command line plays all the notes two times: D DV 10 DS D DV 5 DS You can double the length of a note by using it twice: C C If you want two C notes you will need a rest between them: C R C where R is
TO R
TONE 0 2
END
GENERAL HELP WITH SHAPES & PICTURES:
The picture you draw should have a new shape or two in it that you created. Some of my work below contains special shapes. The command SHAPES shows you all the shapes that you can use with the SETSH command. See table in LOGO instructions. For example with the song find on your disk: "Creation"= CREATION; "Ole Susanna" = MELODY.

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