Everything works except you have to interrupt the tree, or it will just sit there with the tree forever

shell.nix

@@ -12,34 +12,31 @@ pkgs.mkShell {
 
 	shellHook = ''
 		STIME=5
-		programs=("cbonsai" "cmatrix" "nyancat" "fortuneCow")
+		programs="cmatrix cbonsai nyancat fortuneCow"
+	
+		trap 'stty sane; tput cnorm; clear' EXIT
 
 		while true; do
-			choice=$(shuf -n 1 -e "cbonsai" "cmatrix" "nyancat" "fortuneCow")
+			choice=$(echo "$programs" | tr ' ' '\n' | shuf -n 1)
 			clear
 			tput sgr0	
 			case "$choice" in
 				cbonsai)
-					timeout "$STIME" cbonsai -t .2 -l
-					reset
-					clear
+					cbonsai -t .2
+					sleep "$STIME"
 					;;
 				cmatrix)
-					timeout "$STIME" cmatrix
-					reset
-					clear
+					bash -c "cmatrix -u 4 & pid=\$!; sleep $STIME; kill -INT \$pid; wait \$pid"
 					;;
 				nyancat)
 					timeout "$STIME" nyancat
-					reset
-					clear
 					;;
 				fortuneCow)
 					fortune | cowsay
 					sleep "$STIME" 
-					clear
 					;;
 				esac
+				sleep 1
 			done
 	'';
 }