{pkgs ? import <nixpkgs> {} }:

pkgs.mkShell {
	buildInputs = [
		pkgs.cbonsai
		pkgs.cmatrix
		pkgs.neo-cowsay
		pkgs.fortune
		pkgs.nyancat
		pkgs.coreutils
	];

	shellHook = ''
		STIME=5
		programs="cmatrix cbonsai nyancat fortuneCow"
	
		trap 'stty sane; tput cnorm; clear' EXIT

		while true; do
			choice=$(echo "$programs" | tr ' ' '\n' | shuf -n 1)
			clear
			tput sgr0	
			case "$choice" in
				cbonsai)
					cbonsai -t .2
					sleep "$STIME"
					;;
				cmatrix)
					bash -c "cmatrix -u 4 & pid=\$!; sleep $STIME; kill -INT \$pid; wait \$pid"
					;;
				nyancat)
					timeout "$STIME" nyancat
					;;
				fortuneCow)
					fortune | cowsay
					sleep "$STIME" 
					;;
				esac
				sleep 1
			done
	'';
}