Added day 6 part 2

Author: Gentleman1983

day06/README.md

@@ -20,3 +20,22 @@ on the ones that were off.
 * `turn off 499,499 through 500,500` would turn off (or leave off) the middle four lights.
 
 After following the instructions, **how many lights are lit**?
+
+# Part Two
+You just finish implementing your winning light pattern when you realize you mistranslated Santa's message from 
+Ancient Nordic Elvish.
+
+The light grid you bought actually has individual brightness controls; each light can have a brightness of zero or 
+more. The lights all start at zero.
+
+The phrase `turn on` actually means that you should increase the brightness of those lights by `1`.
+
+The phrase `turn off` actually means that you should decrease the brightness of those lights by `1`, to a minimum of zero.
+
+The phrase `toggle` actually means that you should increase the brightness of those lights by `2`.
+
+What is the **total brightness** of all lights combined after following Santa's instructions?
+
+For example:
+* `turn on 0,0 through 0,0` would increase the total brightness by `1`.
+* `toggle 0,0 through 999,999` would increase the total brightness by `2000000`.