How to Charlieplex LEDs with an Arduino

How to Charlieplex LEDs with an Arduino

Charlieplexing demo code: https://pastebin.com/1qavnJ5C

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HEY YOU ABOUT TO POST SOMETHING STUPID:
Yes, I know my hands are large/fat. It's because of a heart condition I suffer from called Congestive Heart Failure. Here's a link to some information about CHF: https://cle.clinic/2TdS2Ux
One of the symptoms is that is causes fluid retention, mostly in the hands, feet/ankles, and face.
It will kill me one day. I'm doing ok right now, but someday...
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Here is all the gear I currently use:
Oscilloscope 1: Hantek DSO5102P https://amzn.to/2K5PoOt
Oscilloscope 2: Siglent SDS1202X-E https://amzn.to/31Kk1yH
Power Supply 1: TekPower TP3005N https://amzn.to/2TeQnxI
Power Supply 2: RUIDENG DP50V5A https://amzn.to/2sNicSe
Signal Generator: JS2800 https://ban.ggood.vip/d9vk
DMM1: Owon18B https://amzn.to/2SbIGLs
DMM2: Aneng 8008 https://amzn.to/2sNQncI
DMM3: Aneng 8009 https://amzn.to/2S5qeEp
DMM4: Uni-T UT801 https://amzn.to/2S89SuL
Soldering Station1: Zeny (Yihua)862D+ https://amzn.to/2S49z4e
Soldering Station2: KSGR T12 https://amzn.to/2Wk7Dn9
Light Meter Smart Sensor AS803 https://amzn.to/2B2gyRg