Mud brick

Copper block can change color as time goes by, even in real life. Copper changes color because of its age. So why not make mud brick turn into mud then dirt. Think about it, mud needs water to stay like that. But as time goes by, if rain doesn’t hit the mud blocks or mud bricks, they start to turn into just regular dirt because they got dried up. Just like in real life, mud gets dried up if water isn’t applied to it. Just an idea