The friends cleaned the park by working together as a team. They picked up all the litter and garbage scattered around the park, using bags and gloves to keep their hands clean. They also swept the paths, trimmed the bushes, and watered the plants. Everyone worked hard to make the park clean and beautiful, and they made sure to leave no trash behind. By the end of the day, the park looked fresh, tidy, and inviting for everyone to enjoy.