zshrc: Screensaver zufaellig zwischen cmatrix und asciiquarium wechseln

zsh/.zshrc

@@ -75,8 +75,11 @@ setopt AUTO_CD
 precmd() { print -Pn "\e]0;%n@%m: %~\a" }
 export COLORTERM=truecolor
 
-# Terminal-Screensaver: cmatrix nach 5 Min Idle
-if command -v cmatrix &>/dev/null; then
-    TMOUT=300
-    TRAPALRM() { cmatrix -sab }
-fi
+# Terminal-Screensaver: zufaellig cmatrix oder asciiquarium nach 5 Min Idle
+TMOUT=300
+TRAPALRM() {
+  local screensavers=()
+  command -v cmatrix &>/dev/null && screensavers+=("cmatrix -sab")
+  command -v asciiquarium &>/dev/null && screensavers+=("asciiquarium")
+  (( ${#screensavers[@]} )) && eval "${screensavers[$((RANDOM % ${#screensavers[@]} + 1))]}"
+}