VON_CROY object is not needed for the screen timer if you are using
In the [Level] section of your script in NG Center type,
"Timer= ENABLED" and build your script.
In NGLE place a FLIPEFFECT trigger to show the screen timer. Note the
screen timer is reset to 0 whenever you show it.
To stop and hide the screen timer use the same FLIPEFFECT trigger as
above but change the "Timer (Parameter <&>):" dropdown box in the Set
Trigger Type window to "Hide screen timer".
There is a CONDITION trigger that
can be used with the screen timer.
If you want a countdown timer, use the ACTION trigger, "Enemy.
Timer. Show the trigger count-down for <#> enemy using (E)format"