Arduino DC Motor Automation

I have a simple mechanism driven by a single DC motor, and I want to hand its entire routine over to an Arduino. What I need is a clean, well-commented sketch that will:

• reverse the motor on command, and
• keep it running in either direction for user-defined time intervals.

I will supply the board, the motor, a standard H-bridge driver and the power supply; you supply the logic. Along with the code, please include a concise wiring diagram so I can reproduce your setup exactly, plus a brief README that explains how to adjust the run times and change-direction trigger in Arduino IDE.

Acceptance criteria
– Uploading the sketch to an Arduino Uno starts the motor cycle without further edits.
– The motor reverses reliably each time the preset duration elapses.
– All pins and external components are documented in the diagram and comments.

If any libraries beyond the standard Arduino core are required, just mention them and I’ll install. Looking forward to seeing a straightforward, rock-solid solution.