This is a great exercise! You can also do all the different fingering permutations. 1234 1243 1324 1342 1423 1432, 2134 2143 2314 2341 2413 2431, 3124 3142 3214 3241 3412 3421, 4123 4132 4213 4231 4312 4321.

This exercise isn’t exactly chromatic tho, here’s a lesson that teaches the chromatic scale it’s only 99 cents. http://www.rockprodigy.com/songdesc/?&id=321 😀