Same with a slider:
Others with a slider:
Do you know what I am doing? 
Do you know what I am doing?
Do you know what I am doing?
This comment is licensed under cc by 4 and antecedent. The Crunch tool is awesome!
Re: Do you know what I am doing?
Some video :
(look at the stripped surfaces on the right and left of the light)
This comment is licensed under cc by 4 and antecedent. The Crunch tool is awesome!