in Eden editor set up a High Command test. Only need to test on your own group.
Then play mission, and go into High Command mode.
Then in debug console, just put:
[] spawn {
sleep 3;
(group player) setGroupIconParams [[0.9,0,0,1], "", 1, false, true];
};
open map, and wait 3 seconds. You will see its only a momentary change.