Create a professional and attractive PowerPoint presentation on "Sewage Cleaning Using Design Thinking" with exactly 6 slides. The first slide should explain Empathize, second Define, third Ideate, fourth Prototype, fifth Testing, and sixth Project Video. Explain each stage using simple points and relevant images. Use our uploaded Arduino-based four-wheel robotic prototype photograph in the Prototype slide, highlighting its components such as Arduino Uno, ultrasonic sensor, motor driver, and DC motors. Include our uploaded project video in the final slide. Use a modern blue-and-green engineering theme with clear diagrams, attractive visuals, and simple English. Make the presentation suitable for an engineering college project.