Hi everyone.....i think this is espen's tutorial on an other site.....but that doesn't matters :
1. Make a multi_manager. In the name write reset_manager. turn off Smart Edit, add ? key: roundreset, value: 1.
Here you just replace "roundreset" with the name of what you want reset.

2. You probably want some lights to start on/off. Make a trigger_relay somewhere.
Give it the following variables:

Name: turnofflights
Target: (here you put the name of the light entity)
Trigger State: on/off (Either you want to start the light on/off)

Add a variable in the multi_manager.
Turnofflights: 1

Step 2 is repeatable

3. We put the value to 1, which is one second after thet round. It could be 0, but resetting an entity that fast could cause problems, and the entity may sometimes not be activated.
The problem is that I don't understand this tutorial so well...but something similar to this is what i need to know.

I made a map with rock music(it's just an audio-combine that when you press "e" starts music,turns on red light and the windows closes) .But in multiplayer,the nextround the music starts alone,without being triggered.Did I miss something? I have to put something else in the multi manager? Or it's something like in espen's tutorial ? 
Thank you for you time :)
Edit: Also...can you tell me how can I set the default colour of the lights to bel bright yellow?