[How to control the motor]

ya.....i'm not using microcontroller to control it..
instead i m using a H-Bridge instead...
well....i'm applying it in my project..which is the "Automatic Swing System"
Have u seen those playground swings....?
my project is based on that concept....the only thing is that it swings back forward automatically....

I'm attatching a circuit which i tot could help me solve my problem..
Can you give me any comment regarding this circuit....

But i was confuse about the operation.
For example, if the motor is rotating in clockwise direction, can i immediately change the polarity to rotate it in the opposite direction?
By doing so, can the motor be damage due to the immediate change of current?

Well i having problem uploading it........
so

The_H_Bridge_for_DC_Motor_Control.zip

[How to control the motor]

I'm curently having some problems with the motor application.
First of all, the motor i'm currently using is a DC motor.
Most probably a 12-24V DC-Motor.
The DC Motor should rotate in both back and forward directionn automatically..
Is there any other method to control the change of direction of the motor without involving a microcontroller..?
Can any mechanical method involve..?