You didn't write anything wrong 
. The same is also true for servos: if you want them to move slowly, they will run smoothly while your code is doing other things.
But that's not important for OP's problem, of course.
You didn't write anything wrong . The same is also true for servos: if you want them to move slowly, they will run smoothly while your code is doing other things.
But that's not important for OP's problem, of course.