#define FPS 68 // Frames per seconds can be changed individually
I really hope that you just tried to be funny.
What do you mean that timer doesn't work between two frames?
Look into the manual into the timer function.
Oh and my approach is 100% precise as long as time_frame is precise (which it really should be), it multiplied by 16 to get the seconds with miliseconds needed for the drawing.
And another thing: Casting into an integer (not via the integer() function but with a plain (int)) is much faster than an expensive multiplication that needs at least four processor cycles to finish.
