Just press green flag and watch entropy occur with the heat sprite.
Entropy is a scientific concept and measurable property of randomness and disorder. Scientifically, entropy increases with time, like how a hot object in a room has all its heat in it at first, but as time marches on, the heat goes all over the room, and the object cools down but parts of the room get hotter. Or like how a room starts out nice and clean, but then gets all messy after a while. The only way to decrease entropy is by putting in work by increasing entropy of another system (like cleaning your room, or heating up the object again.) Heat death is a theory for the end of the universe where entropy increases to maximum amount and no more work can be extracted.
