10.32.2 Greatest hits from previous weeks

10.32.2.1 How can I draw the Olympic rings with Mathematica?
10.32.2.2 How to use $\LaTeX$ for typesetting labels and titles in Mathematica
10.32.2.3 QR Code in shopping cart handle
10.32.2.4 Make a scatter plot from two lists
10.32.2.5 1 Plot, 2 Scale/Axis
10.32.2.6 What does "Tag Integer is Protected" message mean?
10.32.2.7 Reproducing Ómar Rayo's "Fresh Fog" Painting
10.32.2.1 How can I draw the Olympic rings with Mathematica?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=8885

How can I draw the 5 interlocking Olympic rings with Mathematica? 
(SVG version) 
Edit 
 
Hard choice, but some pretty cool answers here. I didn't have 3D answers in mind when I posted the question, but ... 
[graphics] [generative-art]
 
asked by Mike Honeychurch https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=77 Score of 47
answered by cormullion https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=61 Score of 23
10.32.2.2 How to use $\LaTeX$ for typesetting labels and titles in Mathematica

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=15884

I need to typeset large number of equations to be used for  PlotLabel  and  Titles  and such.  These have to look nice. Hence I use <... 
[formatting] [latex]
 
asked by Nasser https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=70 Score of 59
answered by Jens https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=245 Score of 47
10.32.2.3 QR Code in shopping cart handle

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=26268

This week, the market people from my work wanted to put QR codes in shopping cart handles, but when they tested it, the QR code did not work. I noted that the cylindrical curvature (even small) ... 
[image-processing]
 
asked by Murta https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=2266 Score of 203
answered by halirutan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=187 Score of 197
10.32.2.4 Make a scatter plot from two lists

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=21884

I have two lists of values 
 
 xx = {0.1, 0.3, 0.35, 0.57, 0.88, 1.0} 
yy = {1.2, 3.5, 4.5, 7.8, 9.0, 12.2} 
 
 
I want to make a scatter plot (list plot) with xx as x ... 
[plotting]
 
asked by JACKY88 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=2403 Score of 31
answered by Eric Thewalt https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=6313 Score of 45
10.32.2.5 1 Plot, 2 Scale/Axis

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=627

I would like to plot those two datasets on top of each other. But they have very different range on the $y$ axis. How can I have two different axis? 
 
I found the following on the help menu but quite ... 
[plotting] [customization]
 
asked by 500 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=172 Score of 164
answered by ArgentoSapiens https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=92 Score of 164
10.32.2.6 What does "Tag Integer is Protected" message mean?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=6738

(Newbie question) 
 
For every function I define I get this message: 
When I close and reopen Mathematica, and re-enter the function definition, I don't get the message anymore. What does it mean? 
[warning-messages]
 
asked by stevenvh https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1450 Score of 16
answered by J. M.'s missing motivation https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=50 Score of 17
10.32.2.7 Reproducing Ómar Rayo's "Fresh Fog" Painting

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=304043

Ómar Rayo 
Ómar Rayo (1928 - 2010) was a Colombian painter best known for his 
op-art paintings. He completed his first drawing studies at an 
academy in Buenos Aires. In 1960 he received a Guggenheim ... 
[graphics] [computational-geometry] [generative-art]
 
asked by eldo https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=14254 Score of 20
answered by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172 Score of 24