LOGO – Page 4 – MrW's Computing Blog

Y5 LF:Use variables to draw different shapes

Nov 112019

Warm up

Check work from last week – have I left you a learning conversation? Can you fix/finish something? Ask if not sure.
Typing

Get started

1. Start a new LOGO page. Type:

reset
setpensize 5

3. Draw a square:

repeat 4 [fd 50 rt 90]

4. What do the numbers mean in this code? 4? 50? 90?

5. How could we change the numbers to get a different shape? A triange? A pentagon? A hexagon? Have a go and see what happens.

6. Type this code:

make “sides 6
repeat :sides [fd 50 rt 360/:sides]

7. sides is called a VARIABLE – we can change it to be any number.

8. Change the 6 to a 5 and play again. Try some different numbers.

9. Use this code to move to different places on the page:

pu setxy 100 100 pd

Numbers can be from -250 to 250 (0 0 is in the middle)

10. Can you make something like this picture – different shapes spread around the page?

11. Think carefully: for each shape, you need lines of code for

– move to a different place
– change the variable
– draw the shape

(You can copy and paste lines of code to save time typing)

11th November 2019
Posted by Mr W at 11:23 am
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News
Tagged with: coding, j2code, LOGO, Y5, Y5T2

Y3 How do I program in LOGO?

Nov 102019

j2launch –
Click on Level 3
Type reset
This code draws a single step like the one below:
- fd 30
- rt 90
- fd 30
- lt 90
Press play – you should get this:
Now add this to your code:
- pu
  setxy -200 50
  pd
Challenge 1: Make this shape by typing more instructions:
Now add this to your code:
- pu
  setxy 130 100
  pd
Challenge 2: Now make a square:
Now add this to your code:
- pu
  setxy -140 -140
  pd
Challenge 3:
Now add this to your code:
- pu
  setxy 140 – 140
  pd
Challenge 4:

The final picture should look like this:

Is there any way we could make our code simpler? Some of the algorithms repeat instructions.

Success steps:

Copy instructions carefully
Press play to run program
Make instructions to draw simple shapes including forward, left and right
Check instructions carefully for mistakes (bugs)

If you have finished, try working through these debugging challenges!

And if you finish that…! Start a new file and start with this code.

reset
setpensize 5

Can you draw a letter? ~(Diagonal letters will need rt 45 or lt 45)

10th November 2019
Posted by Mr W at 10:13 am
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Tagged with: coding, j2code, LOGO, Y3, Y3T2

Y5 Debugging in LOGO

Nov 022019

LOGO bug challenges

Go to My files – Shared files – st-marks-wilts-sch-ujk – LOGO debugging
Open logo bug challenge 1 – correct the code – you should get a spiral and a message when you press play
Repeat with logo bug challenges 2 and 3

Squares

Go to j2code – LOGO – level 3
Type this:

reset
setpensize 5

Type the following to draw a square.

repeat 4 [fd 50 rt 90]

Can you explain why this draws a square?
Change the code so that the suqare is:
- twice as big
- half the size
- has only three sides drawn, like this

Using variables

After setpensize 5, add a line (using return key)
Type this:

make “length 50

Now change your square code, swapping the fd number for :length

repeat 4 [fd :length rt 90]

Try changing the number in the make “length line of code
Now make you whole code look like this:

reset
setpensize 5
make “length 50
repeat 10
[
repeat 4 [fd :length rt 90]
make “length :length + 10
]

Can you explain it?
Play with it – try changing some numbers to make more squares, smaller differences
Challenge – can you make it do this just by changing the length starting number and how much it changes?

2nd November 2019
Posted by Mr W at 3:03 pm
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Tagged with: debugging, LOGO, variablesj2code, Y5, Y5T2

Y3 JIT5 Turtle

Oct 232019

j2launch – JIT5 – Turtle
Big bad wolf
1. Make the wolf visit the three houses
Space
1. Visit each of the planets
Desert adventure
1. Get to the pond without touching prickly cactus
Cars
1. Reverse the car into a single space
Flowers
1. Visit each of the flowers

use the arrows
see the code
press play

use the arrows (character doesn’t move)
see the code
press play
send character back to start
to delete code

23rd October 2019
Posted by Mr W at 10:31 am
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Tagged with: coding, JIT5, LOGO, Y3, Y3T2

Y3 How do I draw shapes with j2code?

Feb 112019

Success steps

Log into j2e
Go to j2code and click the big LOGO button
Follow the instructions on the sheet
Use the arrow keys to draw three letters
Remember
1. forward is always the way the turtle is pointing
2. Left and right always mean “turn on the spot”
** Draw a bubble letter (you will need pen up and pen down)
** Edit the program text to make the pen thicker
Save work

Help videos

Letter 2 extension:

Add this arround your code:

repeat 4 [ repeat 11 [L] rt 90 ]

11th February 2019
Posted by Mr W at 7:00 am
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Tagged with: draw, j2code, LOGO, maths, shapes, Y3, Y3T2

Y6 Which LOGO commands can you use?

Dec 202018

Go to j2launch – j2code – LOGO
Start your program with:
1. reset
2. setpensize 5
Copy the face…
1. I started with the mouth: rt 45

Use as many of these commands as possible:
1. Movement: fd bk rt lt (with a space then a number)
2. circle (with a space and a number)
3. colour “yellow
4. fill
5. repeat 4 [ … ]
6. arc 90 30 – can you work out how this works? (One number is the size, the other is the angle)
Use the code below to move around the page without drawing:
1. pu setxy 100 100 pd (The numbers are x y coordinates and the screen goes from -250 to 250)
Are there any other commands you can show that you can use?
Be resourceful:
1. Your memory..
2. Your old LOGO files
3. Old blog posts – search my blog for “logo”
  1. instructions
  2. help videos
4. x y coordinate finder (only goes up to 240/180 in Scratch – in LOGO it goes up to 250 on each axis)

Challenge 1 – copy the house picture below
Challenge 2 – make your own picture
Challenge 3 – write the word Computing

Success steps

Use known commands
Use left-hand side panel to copy correct commands (syntax)
Create a page with several elements
Move around the screen using pu setxy …. pd
**Learn new commands
** Use procedures
Check code and debug

20th December 2018
Posted by Mr W at 7:00 am
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Tagged with: intro, j2code, LOGO, Y6, Y6T2

Y5 What LOGO commands can you use?

Dec 102018

FINAL CHALLENGE

Robot Santa face! Add features to make your robot face into Santa!

Use fill – start with colour “darkblue fill to make a night time background
Add a hat – fill in red with a white bobble
colour “white for features
Add a beard
Add “Ho ho ho” text!

1 Label code with ;———–LABELS———–

2 ** Procedures to eye instructions end

Go to j2code and click on LOGO
Make sure you are on Level 3

CHALLENGE: Write instructions in LOGO to make this picture.

TIPS

Don’t get rid of your code! That’s the important bit.
Keep pressing play (after every new command)
Keep saving
Useful commands
- pu = pen up so it doesn’t draw
- pd = so it draws again
- setpensize 10 for a thicker line
- circle 30
- arc 50 180 draws part of a circle
- repeat 4 [fd 100 rt 90] for a square
- pu setxy 50 60 pd to jump to a new place without drawing. Here’s a Scratch program to help find which numbers to use – Positioin finder

SUCCESS STEPS

Try new commands and ideas – be curious
Type accurately
Spot your own mistakes – be resilient
Save (logo face) and tag (y5logo)

FINISHED?

Can you…

make it smile!
add some spiky hair using repeat, eg
change the shape of the right eye – a hexagon maybe…
add a spiral ear

FINISHED AGAIN?!

Start to design and create your own picture
use: repeat, setxy, arc, circle, colour, fill
Can you use procedures at the beginning?

Next time…

Complete a challenge shape/picture using a range of commands
Think of a simple picture with repeated elements, see here for examples. Use LOGO to draw it!

10th December 2018
Posted by Mr W at 7:02 am
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Tagged with: intro, j2code, LOGO, Y5, Y5T2

Y4: How do I plan a Roman pattern in LOGO?

Dec 102018

Draw some simple patterns on this Roman pattern ideas j2e5 file. Here are some ideas.
Create the instructions in LOGO to draw your chosen one.
j2launch – j2code – LOGO
Click on Level 3
Start your program with
- reset
  setpensize 5
  1. For each instruction you add, test it
  2. Make sure:
    1. the arrow finishes at the original level and across to the right a bit
    2. the arrow is pointing UP at the end of your instructions
Put this above your instructions (to move it to the top corner)
- pu setxy -240 180 pd
- Test your code – you might need to change the numbers so that your shape fits on the screen.
Repeat your shape by adding in this:
- repeat 4
- [
- your instructions
- ]
Edit your code. Can you:
1. Make the shape smaller by changing the fd numbers?
2. Make more shapes so it takes up the whole length of the screen?
Now put your code inside another repeat to get the four sides of the square:
1. repeat 4
2. [
3. all of your shape code so far including the repeat
4. rt 90 (to turn the corner)
5. ]

Success steps:

Copy instructions carefully
Use fd, lt, rt with a space and a number
Press play to run program
Make instructions to draw simple shapes including forward, left and right
Check instructions carefully for mistakes (bugs)

10th December 2018
Posted by Mr W at 7:00 am
No Responses
News
Tagged with: LOGO, plan, roman border, Y4, Y4T2

LOGO tyre marks

Feb 062018

These tyre marks on the icy drive at the school front door look a bit like some of our LOGO patterns!

6th February 2018
Posted by Mr W at 1:35 pm
2 Responses
News
Tagged with: challenge, image, LOGO

LOGO random

Dec 122017

random chooses a random number from 0 to the number you specify
So random 10 will pick a number from 0 to 10
If you use repeat, you can make lots of things appear in random places
Try this code:

repeat 20
[
pu setxy random 250 random 250 pd
circle 10
]

Instead of a circle, you could make a procedure called snowflake to create your own snowfall!
How can you change random 250 to get it anywhere on the screen (between -250 and 250)?

12th December 2017
Posted by Mr W at 11:02 am
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Tagged with: LOGO, random

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