question about rotating the cameras view

#12004-07-01

i would like to know what the trigger would be to make it so every time a player typed -turn right
it will turn 25 degrees to the right, and if he types again, 25 more degrees, etc

and then also how to make it turn to the left 25, and again.... etc

i know the event part, just i didnt see an option for turning the camera left or right anc doing it continously, i only saw -set camera to degree X
which isnt what i want

thanks to anyone who helps