How to reset a counter

Purpose: Original value is origVal, we want to use increase/decrease to update to a specified number

How?

1. origValue = origValue + expectedValue
2. diff = expectedValue - origValue
3. origValue = origValue + diff

Ex. origValue = 54, newValue = 50

1. origValue = origValue (54) + expectedValue (50) = 104
2. diff = expectedValue (50) - origValue (104) = -54
3. origValue = origValue (104) + diff (-54) = 50