modify basic filestructure

It's unclear what's 'basic', so `basic/` notes have been mostly moved.
The remainder became `shell/`.

shell/joyous_ascii.md

@@ -0,0 +1,26 @@
+---
+title: "Joyous ASCII"
+tags: [ "fun" ]
+---
+
+- `asciiquarium`
+- `cbonsai -lim "$(fortune)"`
+- `printf 'w\na\n' | ssh -tt nethack@alt.org`
+
+```sh
+cow=$(cowsay -l | sort -R | head  -1)
+fortune -s | figlet | cowsay -nf $cow | lolcat
+```
+
+Watch the [Collatz Conjecture](https://en.wikipedia.org/wiki/Collatz_conjecture) collapse:
+
+```sh
+x="$(du -sc ~/.cache | tr -d '[:alpha:]' | tail -1)"
+until [ "$x" -eq "1" ]; do
+    test "$(( x % 2 ))" -eq 0 && x=$(( x / 2 )) || \
+        x=$(( x * 3 + 1 ))
+    clear -x
+    figlet "$x" | lolcat
+    sleep 1
+done
+```