Now I tried to make a program that seeks the minimum value.
[Download] Program to seek the minimum (Created in NXT software 2.0)

I tried to expand the first half. Then, rewrite the variable name, is to reverse the sign of the comparison block. And, I want you to focus on the screen, adding one more variable block.
In this variable block, "99"is written in the variable of "minimum value". It must increase the minimum, the recording will have to be updated.