I was trying and I used a Variable, It decreases when entity thinks, and when entity thinks It plays a sound like C4, but I want to show all players a Hudmessage.
For play sound nearer when time passes I use "square root" with variable what decreases, and I was thinking in take a percentage, like it:
sqroot of 35.0 = 100%
sqroot of Timer = x
I use Simple three rule, to take percentage, thanks for help.