startup script - Ubuntu help

Hello, I wonder if anyone is good to make startup scripts to ubuntu.
I want the script look like this
"
ram: "3G"

spigot: "server.jar"
echo "########################"
echo "# Control + D #"
echo "# Close down the server #"
echo "# Server start in 5 seconds #"
echo "#########################"
sleep 2
echo "##########################"
echo "# Server starts in 3 seconds #"
echo sleep 1
echo "# Server starts in 2 seconds #"
sleep 1
echo "# Server starts in 1 second #"
Sleep 1
echo "# Server starting #"
java -Xmx$ram -Xms$ram -jar $spigot
done
"
Anything like this