This is a simplified version of the programming language Logo. Use it to draw shapes by moving the turtle around the screen with the following commands.
fd 10 moves the turtle forward ten steps.
bk 5 moves the turtle back five steps.
rt 90 turns the turtle 90° to the right.
lt 45 turns the turtle 45° to the left.
Sends the turtle back to the middle of the screen.
The turtle can then move without drawing a line.
repeat 4[fd 10 rt 90] draws a square.
pc 2 draws in red.
0 = black, 1 = blue, 2 = red, 3 = green and so on.
Each fd or bk counts as one shot.
Here is every command this version of Logo understands. The commands marked Level 2 and Level 3 work at Level 1 too, once you are ready for them. Remember that one step is ten pixels at Level 1.
Level 1 - Basic use of Logo commands to draw shapes
Level 2 - Some more Logo commands to draw more complex shapes
Level 3 - Use Logo procedures to draw more complex diagrams
More on Angles including lesson Starters, visual aids and investigations.
New in this version: the computer looks at your drawing and decides whether it answers the challenge. Judging a picture is a hard thing for software to do, so it will not always get it right. If you are sure your drawing answers the challenge but no star appears, show it to your teacher. Teachers with a Transum subscription can award the Logo trophy from their dashboard.
Every command you have typed this session. Click one to put it back in the command box.
Damian Johnson, Emmaus Catholic Primary School, Australia
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