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First Forward Into Logo
Previous: FF11
In FF9 you looked at several different sequences of numbers.
Here are more programs that generate sequences.
Now consider the following procedures.
TO SUMO :X :N
PR :X
WAIT 120
SUMO :X + :N :N + 2
END
What do you think is happening this time?
Try 'chasing' through the procedure the values: x= 1 and n = 1.
The output from this program is given on the right.
Now why not experiment further by changing the fourth line?
For example:
TO SUMO :X :N
PR :X
WAIT 120
SUMO :X + :N :N + 3
END
Or
SUMO :X * :N :N  3
SUMO :X + :N * 2 :N + 1
SUMO :X  :N :N + 3 Etc
Any surprises?

1
2
5
10
17
26
37
50
65
82
101
122
stopped
in SUMO
2
6
8
8
6
2
4
12
22
34
48
stopped
in SUMO

A Short introduction to using Logo. This is the first in a twelve part series.
Can you use LOGO to create this star pattern made from squares. Only basic LOGO knowledge needed.
Using LOGO, can you construct elegant procedures that will draw this family of 'floor coverings'?