Newton

The newton language is simple. We have an apple. @ This apple is launched by a tree. & And if it passes by a mirror, it is rebated. _ | / \ When it passes by an inc + it is incremented. When it passes by a dec - it is decremented. When it passes by a print # it outputs the ASCII of the number stored in it. When it passes by an in $ it inputs a value and store in it.

Cat program
/#\ & \$/