How can I write a startup script for OSX?

Question

I'm unfamiliar with how this works with OSX. I just want a script to run whenever the OS loads up. Simple script to restart my servers via python. There's about 4 of them. So how do I run commands like the following at startup?

cd Applications/MyServer
python myserver.py

cd Applications/MyOtherServer
python myotherserver.py

and so on? I don't know where to place the script, or what type of file to save it in :/

UPDATE: ok i figured out that its just a matter of dumping that into a text file with an extension of .sh. Then running the sh myScript.sh command. But I'm still hunting for an answer how to get this to run at startup.

UPDATE: here's my script to start my servers. I'm still looking for a way to get it into startup. had to do them in separate windows as the application will then run in this window.

# Start up Server 1
osascript -e 'tell app "Terminal"
    do script "python /applications/Server1/server1.py"
end tell'

# Start up Server 2
osascript -e 'tell app "Terminal"
    do script "python /applications/server2/server2.py"
end tell'

# Start up Server 3
osascript -e 'tell app "Terminal"
    do script "python /applications/server3/server3.py"
end tell'

Answer 1

Note: I didn't test this but it has a chance of actually working ;)

• create a runnable script
• go to Preferences -> "Users and Groups" -> Your user -> "Login Items" tab
• Drag and drop your script into the list of items to run.
• reboot

Answer 2

lol ok...

so the answer was simply to make the .sh file executable by running

chmod a+x LaunchServers.sh

Then associating the file type to run with terminal, then adding it to startup items under Users & Groups in system prefs. Tested and working.