- optical illusion
This was originally observed as tiles on a cafe wall. The tiles appear distorted.
To
New
# set default screen, pen and turtle values
ResetAll SetScreenSize [400 400] HideTurtle
SetSC Black SetPC Green SetPS 1 PenUp
End
To
DrawGrid
For [
Z
0 2] [
For [
X
0 5] [
For [
Y
0 3] [
SetY (
:
Side
*:Y)+(4*
:
Side
*:Z)-176
If
:
Y
=3 [Make
Y
1]
SetX (12*
:
Y
)+(2*
:
Side
*
:
X
)-172
Square
:
Side
Fill ] ] ]
End
To
DrawLine
For [Y 0 10] [
SetXY Minus 188 (
:
Y
*
:
Side
) - 160
PenDown Forward 376 PenUp]
End
To
Square
:
Side
# square (side x side) drawn from centre (tp)
Back
:
Side
/2 Right 90 Back
:
Side
/2 PenDown
Repeat 4 [
Forward
:
Side
Left 90]
PenUp Forward
:
Side
/2 Left 90 Forward
:
Side
/2
# r2c
End
To
Go
New
SetSC [255 255 204] SetH 90
Make "
Side
32
SetPC [0 51 0]
DrawGrid
SetPC Red
DrawLine
End