Death Counter waits are a system of utilizing the Deaths condition and the Set Deaths action to make a wait. While best used with triggers that constantly repeat, they can also be used in place of normal waits.
See the following triggers:
Players:I'll use Player 1 as an example.
Conditions:Actions:Modify deaths for Player 1: Subtract 1 for unit.
Preserve trigger.
Players:Conditions:Player 1 has suffered at most 0 deaths of unit.
Actions:Modify deaths for Player 1: Set to 120 for unit.
Display for current player: "You'll see this every ten seconds!"
What this does is constantly subtract 1 from a death counter. When that counter reaches zero, it is reset to 120, and a text message is displayed. Once the counter is reset, it once again begins to count down from 120, back to 0. If you have hyper triggers, it will take exactly 10 seconds for the counter to reach zero. Replace the 'Display text' action above with whatever action you want to run.
And that's how it works! Some tips:
Make sure that the unit you are using for your death counter can't actually be killed in your map. Use an unused unit, such as Jump Gate, or Independent Command Center.
12 Death Counters = 1 second, real time, on Fastest speed.