Okay kiddo, imagine you have a big box with wheels that can drive on the road. This box has a special machine inside that can paint lines on the ground. These lines help drivers know where to drive and where not to drive.
The machine uses a special kind of paint that dries quickly in the sun. It has a long hose that sprays the paint onto the road in a neat line. The driver of the box steers it all around the road, making sure to paint the right lines in the right places.
Sometimes, the machine even has extra gadgets that can make different kinds of lines like arrows or stop signs. This helps make the road even safer for drivers. And that's how a road marking machine works!