Need help modifing the mysqld_multi script

I running a multi instance mariadb cluster with 3 nodes. The nodes are all SUSE (SLES) 12. I have copied the mysqld_multi script form /usr/bin to /etc/init.d to enable the startup and shutdown of all the databases when the system starts and stops. Problem I'm having is that if I use mysqld_mult stop/start (to stop/start them all) only one or two will actually stop/start the rest just won't work. But I f I start/stop them one at a time with a few seconds delay between commands it works just fine.

So what I'm looking to do is to modify the mysqld_multi script to add a 5 sec delay in between each instances start/stop. Just not where the best place in the script to do this.

Any ideas ?